Fix typos in documentation
Fix typos in documentation

Author: Antoine Augusti <AntoineAugusti@users.noreply.github.com>

Closes #352 from AntoineAugusti/patch-1 and squashes the following commits:

773aa2a [Antoine Augusti] Fix typos in documentation

wakamori/incubator-zeppelin,namanmishra91/zeppelin,joroKr21/incubator-zeppelin,nikste/incubator-zeppelin,datalayer/zeppelin,igorborojevic/incubator-zeppelin,jongyoul/zeppelin,r-kamath/incubator-zeppelin,tribbloid/incubator-zeppelin,ankurmitujjain/incubator-zeppelin,Madhuka/incubator-zeppelin,nikste/incubator-zeppelin,tzolov/incubator-zeppelin,samuel-pt/incubator-zeppelin,YuanGunGun/zeppelin,sctincman/zeppelin,datalayer/zeppelin-datalayer,igorborojevic/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,AlexanderShoshin/zeppelin,rlugojr/incubator-zeppelin,apache/incubator-zeppelin,zjffdu/zeppelin,tinkoff-dwh/zeppelin,minahlee/zeppelin,zetaris/zeppelin,Solution-Global/zeppelin,cris83/incubator-zeppelin,jlagarden/zeppelin,YuanGunGun/zeppelin,sagarkulkarni3592/incubator-zeppelin,IceKhan13/zeppelin,samuel-pt/incubator-zeppelin,volumeint/zeppelin,lresende/incubator-zeppelin,SachinJanani/zeppelin,cris83/incubator-zeppelin,sravan-s/zeppelin,lobamba/zeppelin,rlugojr/incubator-zeppelin,radicalbit/incubator-zeppelin,Solution-Global/zeppelin,digitalreasoning/incubator-zeppelin,yu74n/zeppelin,Altiscale/incubator-zeppelin,vrajat/incubator-zeppelin,cjmatta/incubator-zeppelin,vrlo/zeppelin,ReeceRobinson/incubator-zeppelin,datalayer/zeppelin,swakrish/incubator-zeppelin,jlagarden/zeppelin,rconline/zeppelin,tillrohrmann/incubator-zeppelin,fogbeam/zeppelin_mirror,digitalreasoning/incubator-zeppelin,mfelgamal/zeppelin,ravicodder/incubator-zeppelin,pellmont/zeppelin,anthonycorbacho/incubator-zeppelin,sohaibiftikhar/zeppelin,mwpenny/zeppelin-esri,tinkoff-dwh/zeppelin,optimizely/incubator-zeppelin,astroshim/zeppelin,fazlan-nazeem/incubator-zeppelin,astroshim/incubator-zeppelin,tinkoff-dwh/zeppelin,ReeceRobinson/incubator-zeppelin,apache/zeppelin,wakamori/incubator-zeppelin,datalayer/zeppelin-datalayer,tzolov/incubator-zeppelin,yu74n/zeppelin,sctincman/zeppelin,jongyoul/incubator-zeppelin,onkarshedge/incubator-zeppelin,vgmartinez/incubator-zeppelin,tzolov/incubator-zeppelin,SachinJanani/zeppelin,granturing/incubator-zeppelin,lobamba/zeppelin,IceKhan13/zeppelin,minahlee/zeppelin,hkropp/incubator-zeppelin,digitalreasoning/incubator-zeppelin,vipul1409/zeppelin,astroshim/zeppelin,raysteam/zeppelin,ReeceRobinson/incubator-zeppelin,ravicodder/incubator-zeppelin,mwkang/zeppelin,benoyantony/zeppelin,suvam97/zeppelin,datalayer/zeppelin-R,zetaris/zeppelin,HeartSaVioR/incubator-zeppelin,suvam97/zeppelin,lobamba/zeppelin,yu74n/zeppelin,apache/incubator-zeppelin,SachinJanani/zeppelin,datalayer/zeppelin,apache/incubator-zeppelin,cfries/zeppelin,volumeint/zeppelin,lresende/incubator-zeppelin,radicalbit/incubator-zeppelin,pellmont/zeppelin,raysteam/zeppelin,TelekomAustriaGroup/incubator-zeppelin,wakamori/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,RamVenkatesh/incubator-zeppelin,Madhuka/incubator-zeppelin,spacewalkman/incubator-zeppelin,VipinRathor/zeppelin,swakrish/incubator-zeppelin,vrlo/zeppelin,Leemoonsoo/zeppelin,r-kamath/zeppelin,elbamos/Zeppelin-With-R,radicalbit/incubator-zeppelin,mwkang/zeppelin,hammertank/zeppelin,TelekomAustriaGroup/incubator-zeppelin,samuel-pt/incubator-zeppelin,Leemoonsoo/zeppelin,sagarkulkarni3592/incubator-zeppelin,elbamos/Zeppelin-With-R,Nova-Boy/zeppelin,astroshim/zeppelin,ankurmitujjain/incubator-zeppelin,astroshim/zeppelin,granturing/incubator-zeppelin,AlexanderShoshin/zeppelin,onkarshedge/incubator-zeppelin,onkarshedge/incubator-zeppelin,Leemoonsoo/zeppelin,swakrish/incubator-zeppelin,pellmont/zeppelin,hammertank/zeppelin,apache/incubator-zeppelin,astroshim/incubator-zeppelin,cris83/incubator-zeppelin,mfelgamal/zeppelin,astroshim/zeppelin,wary/zeppelin,igorborojevic/incubator-zeppelin,granturing/incubator-zeppelin,cris11/incubator-zeppelin,Leemoonsoo/zeppelin,cfries/zeppelin,rlugojr/incubator-zeppelin,eranwitkon/incubator-zeppelin,radicalbit/incubator-zeppelin,cris83/incubator-zeppelin,sravan-s/zeppelin,r-kamath/incubator-zeppelin,yorek/zeppelin,mwkang/zeppelin,nikste/incubator-zeppelin,1ambda/zeppelin,minahlee/zeppelin,herval/zeppelin,fogbeam/zeppelin_mirror,sagarkulkarni3592/incubator-zeppelin,VipinRathor/zeppelin,sergeymazin/zeppelin,1ambda/zeppelin,sergeymazin/zeppelin,RamVenkatesh/incubator-zeppelin,vgmartinez/incubator-zeppelin,vrlo/zeppelin,jlagarden/zeppelin,jongyoul/zeppelin,anthonycorbacho/incubator-zeppelin,fazlan-nazeem/incubator-zeppelin,zjffdu/zeppelin,prabhjyotsingh/zeppelin,yu74n/zeppelin,HeartSaVioR/incubator-zeppelin,karuppayya/zeppelin,SachinJanani/zeppelin,HeartSaVioR/incubator-zeppelin,hkropp/incubator-zeppelin,apache/incubator-zeppelin,sravan-s/zeppelin,hkropp/incubator-zeppelin,YuanGunGun/zeppelin,vgmartinez/incubator-zeppelin,joroKr21/incubator-zeppelin,vipul1409/zeppelin,RamVenkatesh/incubator-zeppelin,karuppayya/zeppelin,mwkang/zeppelin,MikeTYChen/incubator-zeppelin,VipinRathor/zeppelin,RamVenkatesh/incubator-zeppelin,vrajat/incubator-zeppelin,wakamori/incubator-zeppelin,YuanGunGun/zeppelin,cris11/incubator-zeppelin,pravin-dsilva/zeppelin,datalayer/zeppelin,cfries/zeppelin,igorborojevic/incubator-zeppelin,sravan-s/zeppelin,herval/zeppelin,zjffdu/zeppelin,apache/zeppelin,wary/zeppelin,swakrish/incubator-zeppelin,soralee/zeppelin,rlugojr/incubator-zeppelin,openthings/zeppelin,brigade/incubator-zeppelin,wary/zeppelin,joroKr21/incubator-zeppelin,mwpenny/zeppelin-esri,r-kamath/incubator-zeppelin,minahlee/zeppelin,fazlan-nazeem/incubator-zeppelin,volumeint/zeppelin,wary/zeppelin,ankurmitujjain/incubator-zeppelin,nikste/incubator-zeppelin,r-kamath/incubator-zeppelin,MikeTYChen/incubator-zeppelin,hammertank/zeppelin,cfries/zeppelin,galleon/incubator-zeppelin,pravin-dsilva/zeppelin,yorek/zeppelin,tzolov/incubator-zeppelin,IceKhan13/zeppelin,raysteam/zeppelin,hammertank/zeppelin,apache/zeppelin,swakrish/incubator-zeppelin,astroshim/incubator-zeppelin,cris11/incubator-zeppelin,onkarshedge/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,jongyoul/incubator-zeppelin,TelekomAustriaGroup/incubator-zeppelin,openthings/zeppelin,jongyoul/incubator-zeppelin,apache/zeppelin,optimizely/incubator-zeppelin,r-kamath/incubator-zeppelin,lobamba/zeppelin,cquptEthan/incubator-zeppelin,sagarkulkarni3592/incubator-zeppelin,sagarkulkarni3592/incubator-zeppelin,namanmishra91/zeppelin,onkarshedge/incubator-zeppelin,lresende/incubator-zeppelin,doanduyhai/incubator-zeppelin,vipul1409/zeppelin,datalayer/zeppelin,cfries/zeppelin,elbamos/Zeppelin-With-R,anthonycorbacho/incubator-zeppelin,jlagarden/zeppelin,openthings/zeppelin,prabhjyotsingh/zeppelin,jlagarden/zeppelin,brigade/incubator-zeppelin,SachinJanani/zeppelin,optimizely/incubator-zeppelin,issaclee/silkroad,r-kamath/zeppelin,elbamos/Zeppelin-With-R,rerngvit/incubator-zeppelin,apache/incubator-zeppelin,suvam97/zeppelin,namanmishra91/zeppelin,r-kamath/incubator-zeppelin,fogbeam/zeppelin_mirror,ravicodder/incubator-zeppelin,fogbeam/zeppelin_mirror,Leemoonsoo/zeppelin,prasadwagle/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,1ambda/zeppelin,tzolov/incubator-zeppelin,elbamos/Zeppelin-With-R,Nova-Boy/zeppelin,apache/zeppelin,SachinJanani/zeppelin,1ambda/zeppelin,doanduyhai/incubator-zeppelin,pellmont/zeppelin,digitalreasoning/incubator-zeppelin,astroshim/incubator-zeppelin,astroshim/zeppelin,wary/zeppelin,minahlee/incubator-zeppelin,cjmatta/incubator-zeppelin,VipinRathor/zeppelin,Leemoonsoo/incubator-zeppelin,karuppayya/zeppelin,joroKr21/incubator-zeppelin,RamVenkatesh/incubator-zeppelin,namanmishra91/zeppelin,Altiscale/incubator-zeppelin,sohaibiftikhar/zeppelin,pravin-dsilva/zeppelin,benoyantony/zeppelin,mwpenny/zeppelin-esri,yorek/zeppelin,joroKr21/incubator-zeppelin,vipul1409/zeppelin,hkropp/incubator-zeppelin,mfelgamal/zeppelin,mfelgamal/zeppelin,sravan-s/zeppelin,fogbeam/zeppelin_mirror,tillrohrmann/incubator-zeppelin,tinkoff-dwh/zeppelin,jlagarden/zeppelin,vrajat/incubator-zeppelin,cris83/incubator-zeppelin,AlexanderShoshin/zeppelin,soralee/zeppelin,granturing/incubator-zeppelin,vipul1409/zeppelin,r-kamath/zeppelin,namanmishra91/zeppelin,jongyoul/zeppelin,ankurmitujjain/incubator-zeppelin,radicalbit/incubator-zeppelin,IceKhan13/zeppelin,granturing/incubator-zeppelin,mwpenny/zeppelin-esri,vrlo/zeppelin,mwkang/zeppelin,brigade/incubator-zeppelin,YuanGunGun/zeppelin,doanduyhai/incubator-zeppelin,chilang/zeppelin,mfelgamal/zeppelin,Nova-Boy/zeppelin,Altiscale/incubator-zeppelin,IceKhan13/zeppelin,mwpenny/zeppelin-esri,prabhjyotsingh/zeppelin,chilang/zeppelin,sctincman/zeppelin,raysteam/zeppelin,raysteam/zeppelin,TelekomAustriaGroup/incubator-zeppelin,cfries/zeppelin,rlugojr/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,rerngvit/incubator-zeppelin,sagarkulkarni3592/incubator-zeppelin,IceKhan13/zeppelin,namanmishra91/zeppelin,1ambda/zeppelin,jlagarden/zeppelin,cquptEthan/incubator-zeppelin,tillrohrmann/incubator-zeppelin,AlexanderShoshin/zeppelin,fazlan-nazeem/incubator-zeppelin,sergeymazin/zeppelin,Altiscale/incubator-zeppelin,issaclee/silkroad,galleon/incubator-zeppelin,elbamos/Zeppelin-With-R,Madhuka/incubator-zeppelin,benoyantony/zeppelin,rerngvit/incubator-zeppelin,issaclee/silkroad,vrlo/zeppelin,galleon/incubator-zeppelin,jongyoul/zeppelin,samuel-pt/incubator-zeppelin,karuppayya/zeppelin,yu74n/zeppelin,wary/zeppelin,cquptEthan/incubator-zeppelin,optimizely/incubator-zeppelin,spacewalkman/incubator-zeppelin,prasadwagle/incubator-zeppelin,igorborojevic/incubator-zeppelin,galleon/incubator-zeppelin,r-kamath/zeppelin,Nova-Boy/zeppelin,minahlee/incubator-zeppelin,cquptEthan/incubator-zeppelin,zjffdu/zeppelin,minahlee/incubator-zeppelin,TelekomAustriaGroup/incubator-zeppelin,astroshim/incubator-zeppelin,lresende/incubator-zeppelin,AlexanderShoshin/zeppelin,digitalreasoning/incubator-zeppelin,galleon/incubator-zeppelin,suvam97/zeppelin,prasadwagle/incubator-zeppelin,MikeTYChen/incubator-zeppelin,rerngvit/incubator-zeppelin,brigade/incubator-zeppelin,cfries/zeppelin,MikeTYChen/incubator-zeppelin,yu74n/zeppelin,Solution-Global/zeppelin,hkropp/incubator-zeppelin,rerngvit/incubator-zeppelin,fazlan-nazeem/incubator-zeppelin,zetaris/zeppelin,MikeTYChen/incubator-zeppelin,soralee/zeppelin,VipinRathor/zeppelin,anthonycorbacho/incubator-zeppelin,vrajat/incubator-zeppelin,zetaris/zeppelin,sctincman/zeppelin,chilang/zeppelin,elbamos/Zeppelin-With-R,benoyantony/zeppelin,karuppayya/zeppelin,tillrohrmann/incubator-zeppelin,cjmatta/incubator-zeppelin,sohaibiftikhar/zeppelin,sohaibiftikhar/zeppelin,cjmatta/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,1ambda/zeppelin,minahlee/zeppelin,prabhjyotsingh/incubator-zeppelin,suvam97/zeppelin,spacewalkman/incubator-zeppelin,vgmartinez/incubator-zeppelin,issaclee/silkroad,tzolov/incubator-zeppelin,openthings/zeppelin,HeartSaVioR/incubator-zeppelin,datalayer/zeppelin-R,sagarkulkarni3592/incubator-zeppelin,datalayer/zeppelin,r-kamath/zeppelin,joroKr21/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,mwkang/zeppelin,digitalreasoning/incubator-zeppelin,YuanGunGun/zeppelin,brigade/incubator-zeppelin,wakamori/incubator-zeppelin,yorek/zeppelin,openthings/zeppelin,karuppayya/zeppelin,VipinRathor/zeppelin,vgmartinez/incubator-zeppelin,ankurmitujjain/incubator-zeppelin,eranwitkon/incubator-zeppelin,cquptEthan/incubator-zeppelin,minahlee/zeppelin,vgmartinez/incubator-zeppelin,fogbeam/zeppelin_mirror,vrajat/incubator-zeppelin,rerngvit/incubator-zeppelin,ravicodder/incubator-zeppelin,rconline/zeppelin,prabhjyotsingh/incubator-zeppelin,joroKr21/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,sergeymazin/zeppelin,Madhuka/incubator-zeppelin,onkarshedge/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,suvam97/zeppelin,fogbeam/zeppelin_mirror,mwpenny/zeppelin-esri,spacewalkman/incubator-zeppelin,apache/zeppelin,mfelgamal/zeppelin,herval/zeppelin,IceKhan13/zeppelin,prasadwagle/incubator-zeppelin,optimizely/incubator-zeppelin,Solution-Global/zeppelin,prabhjyotsingh/zeppelin,datalayer/zeppelin-datalayer,benoyantony/zeppelin,minahlee/incubator-zeppelin,lresende/incubator-zeppelin,issaclee/silkroad,Leemoonsoo/incubator-zeppelin,Nova-Boy/zeppelin,raysteam/zeppelin,pellmont/zeppelin,tillrohrmann/incubator-zeppelin,datalayer/zeppelin-R,cris11/incubator-zeppelin,Madhuka/incubator-zeppelin,hammertank/zeppelin,chilang/zeppelin,spacewalkman/incubator-zeppelin,zjffdu/zeppelin,sergeymazin/zeppelin,Nova-Boy/zeppelin,cris11/incubator-zeppelin,ReeceRobinson/incubator-zeppelin,lobamba/zeppelin,sergeymazin/zeppelin,minahlee/incubator-zeppelin,SarunasG/zeppelin-oidc,tribbloid/incubator-zeppelin,prabhjyotsingh/zeppelin,rerngvit/incubator-zeppelin,lresende/incubator-zeppelin,minahlee/zeppelin,soralee/zeppelin,tribbloid/incubator-zeppelin,volumeint/zeppelin,spacewalkman/incubator-zeppelin,lobamba/zeppelin,hammertank/zeppelin,zetaris/zeppelin,mwpenny/zeppelin-esri,fazlan-nazeem/incubator-zeppelin,datalayer/zeppelin-R,Altiscale/incubator-zeppelin,sravan-s/zeppelin,tinkoff-dwh/zeppelin,igorborojevic/incubator-zeppelin,joroKr21/incubator-zeppelin,r-kamath/incubator-zeppelin,apache/zeppelin,jongyoul/incubator-zeppelin,VipinRathor/zeppelin,AlexanderShoshin/zeppelin,astroshim/incubator-zeppelin,SarunasG/zeppelin-oidc,r-kamath/zeppelin,cquptEthan/incubator-zeppelin,cquptEthan/incubator-zeppelin,doanduyhai/incubator-zeppelin,Altiscale/incubator-zeppelin,prabhjyotsingh/zeppelin,volumeint/zeppelin,onkarshedge/incubator-zeppelin,vipul1409/zeppelin,pellmont/zeppelin,hkropp/incubator-zeppelin,chilang/zeppelin,SarunasG/zeppelin-oidc,ravicodder/incubator-zeppelin,radicalbit/incubator-zeppelin,zjffdu/zeppelin,jongyoul/incubator-zeppelin,samuel-pt/incubator-zeppelin,mwkang/zeppelin,sctincman/zeppelin,SarunasG/zeppelin-oidc,sohaibiftikhar/zeppelin,swakrish/incubator-zeppelin,tinkoff-dwh/zeppelin,tillrohrmann/incubator-zeppelin,spacewalkman/incubator-zeppelin,digitalreasoning/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,HeartSaVioR/incubator-zeppelin,brigade/incubator-zeppelin,Solution-Global/zeppelin,hammertank/zeppelin,ravicodder/incubator-zeppelin,prasadwagle/incubator-zeppelin,ankurmitujjain/incubator-zeppelin,sohaibiftikhar/zeppelin,volumeint/zeppelin,tillrohrmann/incubator-zeppelin,YuanGunGun/zeppelin,herval/zeppelin,datalayer/zeppelin,SachinJanani/zeppelin,cjmatta/incubator-zeppelin,sravan-s/zeppelin,SarunasG/zeppelin-oidc,rconline/zeppelin,eranwitkon/incubator-zeppelin,suvam97/zeppelin,tribbloid/incubator-zeppelin,rconline/zeppelin,soralee/zeppelin,vipul1409/zeppelin,benoyantony/zeppelin,vrlo/zeppelin,ReeceRobinson/incubator-zeppelin,eranwitkon/incubator-zeppelin,herval/zeppelin,jongyoul/incubator-zeppelin,soralee/zeppelin,ravicodder/incubator-zeppelin,rconline/zeppelin,granturing/incubator-zeppelin,TelekomAustriaGroup/incubator-zeppelin,rconline/zeppelin,granturing/incubator-zeppelin,pellmont/zeppelin,openthings/zeppelin,MikeTYChen/incubator-zeppelin,namanmishra91/zeppelin,mfelgamal/zeppelin,eranwitkon/incubator-zeppelin,pravin-dsilva/zeppelin,vrlo/zeppelin,tribbloid/incubator-zeppelin,sergeymazin/zeppelin,tinkoff-dwh/zeppelin,wary/zeppelin,astroshim/zeppelin,herval/zeppelin,SarunasG/zeppelin-oidc,issaclee/silkroad,SarunasG/zeppelin-oidc,jongyoul/zeppelin,volumeint/zeppelin,chilang/zeppelin,Nova-Boy/zeppelin,zetaris/zeppelin,raysteam/zeppelin,pravin-dsilva/zeppelin,prabhjyotsingh/zeppelin,yu74n/zeppelin,jongyoul/zeppelin,Leemoonsoo/zeppelin,soralee/zeppelin,jongyoul/zeppelin,sctincman/zeppelin,Solution-Global/zeppelin,optimizely/incubator-zeppelin,zetaris/zeppelin,optimizely/incubator-zeppelin,doanduyhai/incubator-zeppelin,1ambda/zeppelin,lobamba/zeppelin,brigade/incubator-zeppelin,datalayer/zeppelin-datalayer,zjffdu/zeppelin,Madhuka/incubator-zeppelin,cjmatta/incubator-zeppelin,yorek/zeppelin,radicalbit/incubator-zeppelin,vrajat/incubator-zeppelin,ankurmitujjain/incubator-zeppelin,r-kamath/zeppelin,herval/zeppelin,openthings/zeppelin,lresende/incubator-zeppelin,HeartSaVioR/incubator-zeppelin,pravin-dsilva/zeppelin,prasadwagle/incubator-zeppelin,karuppayya/zeppelin,chilang/zeppelin,Leemoonsoo/zeppelin,Leemoonsoo/zeppelin,yorek/zeppelin,rconline/zeppelin,yorek/zeppelin,cris83/incubator-zeppelin,wakamori/incubator-zeppelin,prasadwagle/incubator-zeppelin,cris11/incubator-zeppelin,datalayer/zeppelin-R,benoyantony/zeppelin,sctincman/zeppelin,nikste/incubator-zeppelin,samuel-pt/incubator-zeppelin,datalayer/zeppelin-R,sohaibiftikhar/zeppelin,pravin-dsilva/zeppelin,rlugojr/incubator-zeppelin,nikste/incubator-zeppelin,doanduyhai/incubator-zeppelin,doanduyhai/incubator-zeppelin,Solution-Global/zeppelin,Madhuka/incubator-zeppelin,AlexanderShoshin/zeppelin,RamVenkatesh/incubator-zeppelin