update documentation with release 2.2.1
update documentation with release 2.2.1

i-am-Nathan/elasticsearch,scorpionvicky/elasticsearch,a2lin/elasticsearch,glefloch/elasticsearch,polyfractal/elasticsearch,scottsom/elasticsearch,palecur/elasticsearch,henakamaMSFT/elasticsearch,markwalkom/elasticsearch,Stacey-Gammon/elasticsearch,uschindler/elasticsearch,fforbeck/elasticsearch,JervyShi/elasticsearch,wuranbo/elasticsearch,LewayneNaidoo/elasticsearch,snikch/elasticsearch,camilojd/elasticsearch,artnowo/elasticsearch,rmuir/elasticsearch,Shepard1212/elasticsearch,snikch/elasticsearch,palecur/elasticsearch,wangtuo/elasticsearch,bornemix/elasticsearch-mapper-attachments,StefanGor/elasticsearch,zkidkid/elasticsearch,obourgain/elasticsearch,s1monw/elasticsearch,lks21c/elasticsearch,andrejserafim/elasticsearch,awislowski/elasticsearch,girirajsharma/elasticsearch,StefanGor/elasticsearch,IanvsPoplicola/elasticsearch,mjason3/elasticsearch,JSCooke/elasticsearch,Shepard1212/elasticsearch,rajanm/elasticsearch,Shepard1212/elasticsearch,davidvgalbraith/elasticsearch,MaineC/elasticsearch,davidvgalbraith/elasticsearch,fernandozhu/elasticsearch,rmuir/elasticsearch-mapper-attachments,markwalkom/elasticsearch,shreejay/elasticsearch,henakamaMSFT/elasticsearch,LewayneNaidoo/elasticsearch,mikemccand/elasticsearch,mortonsykes/elasticsearch,C-Bish/elasticsearch,ivansun1010/elasticsearch,robin13/elasticsearch,lks21c/elasticsearch,i-am-Nathan/elasticsearch,polyfractal/elasticsearch,jchampion/elasticsearch,mjason3/elasticsearch,winstonewert/elasticsearch,brandonkearby/elasticsearch,myelin/elasticsearch,strapdata/elassandra,cwurm/elasticsearch,bjorn-ali-goransson/elasticsearch-mapper-attachments,martinstuga/elasticsearch,glefloch/elasticsearch,rlugojr/elasticsearch,glefloch/elasticsearch,tebriel/elasticsearch,jimczi/elasticsearch,ThiagoGarciaAlves/elasticsearch,sreeramjayan/elasticsearch,episerver/elasticsearch,kaneshin/elasticsearch,LeoYao/elasticsearch,mortonsykes/elasticsearch,andrejserafim/elasticsearch,gmarz/elasticsearch,tebriel/elasticsearch,Helen-Zhao/elasticsearch,mikemccand/elasticsearch,jprante/elasticsearch,rlugojr/elasticsearch,palecur/elasticsearch,F0lha/elasticsearch,clintongormley/elasticsearch,qwerty4030/elasticsearch,mapr/elasticsearch,masaruh/elasticsearch,rajanm/elasticsearch,shreejay/elasticsearch,ZTE-PaaS/elasticsearch,shreejay/elasticsearch,nomoa/elasticsearch,martinstuga/elasticsearch,mikemccand/elasticsearch,artnowo/elasticsearch,JackyMai/elasticsearch,diendt/elasticsearch,F0lha/elasticsearch,rhoml/elasticsearch,dpursehouse/elasticsearch,trangvh/elasticsearch,henakamaMSFT/elasticsearch,palecur/elasticsearch,snikch/elasticsearch,jchampion/elasticsearch,jpountz/elasticsearch,xuzha/elasticsearch,JervyShi/elasticsearch,IanvsPoplicola/elasticsearch,polyfractal/elasticsearch,njlawton/elasticsearch,Collaborne/elasticsearch-mapper-attachments,fforbeck/elasticsearch,elastic/elasticsearch-mapper-attachments,yynil/elasticsearch,StefanGor/elasticsearch,JSCooke/elasticsearch,mjason3/elasticsearch,fforbeck/elasticsearch,trangvh/elasticsearch,ThiagoGarciaAlves/elasticsearch,umeshdangat/elasticsearch,fernandozhu/elasticsearch,winstonewert/elasticsearch,rajanm/elasticsearch,sreeramjayan/elasticsearch,markharwood/elasticsearch,davidvgalbraith/elasticsearch,LeoYao/elasticsearch,PhaedrusTheGreek/elasticsearch,girirajsharma/elasticsearch,masaruh/elasticsearch,fred84/elasticsearch,F0lha/elasticsearch,rhoml/elasticsearch,scottsom/elasticsearch,ricardocerq/elasticsearch,scottsom/elasticsearch,snikch/elasticsearch,lks21c/elasticsearch,njlawton/elasticsearch,wangtuo/elasticsearch,JSCooke/elasticsearch,gmarz/elasticsearch,dongjoon-hyun/elasticsearch,mapr/elasticsearch,markwalkom/elasticsearch,Stacey-Gammon/elasticsearch,andrejserafim/elasticsearch,palecur/elasticsearch,F0lha/elasticsearch,sreeramjayan/elasticsearch,bawse/elasticsearch,clintongormley/elasticsearch,fernandozhu/elasticsearch,JackyMai/elasticsearch,snikch/elasticsearch,jimczi/elasticsearch,umeshdangat/elasticsearch,dongjoon-hyun/elasticsearch,nazarewk/elasticsearch,C-Bish/elasticsearch,Shepard1212/elasticsearch,qwerty4030/elasticsearch,cwurm/elasticsearch,jbertouch/elasticsearch,rajanm/elasticsearch,ThiagoGarciaAlves/elasticsearch,shreejay/elasticsearch,sneivandt/elasticsearch,PhaedrusTheGreek/elasticsearch,gmarz/elasticsearch,i-am-Nathan/elasticsearch,ThiagoGarciaAlves/elasticsearch,gfyoung/elasticsearch,wangtuo/elasticsearch,kalimatas/elasticsearch,ESamir/elasticsearch,kaneshin/elasticsearch,jbertouch/elasticsearch,mmaracic/elasticsearch,vroyer/elassandra,ivansun1010/elasticsearch,a2lin/elasticsearch,MaineC/elasticsearch,gingerwizard/elasticsearch,wbowling/elasticsearch,ggchangan/elasticsearch-mapper-attachments,andrejserafim/elasticsearch,mohit/elasticsearch,JSCooke/elasticsearch,ThiagoGarciaAlves/elasticsearch,winstonewert/elasticsearch,jimczi/elasticsearch,jbertouch/elasticsearch,clintongormley/elasticsearch,nilabhsagar/elasticsearch,markharwood/elasticsearch,njlawton/elasticsearch,JackyMai/elasticsearch,jchampion/elasticsearch,mmaracic/elasticsearch,scottsom/elasticsearch,mohit/elasticsearch,jbertouch/elasticsearch,wenpos/elasticsearch,gingerwizard/elasticsearch,fernandozhu/elasticsearch,s1monw/elasticsearch,wenpos/elasticsearch,GlenRSmith/elasticsearch,gingerwizard/elasticsearch,sreeramjayan/elasticsearch,maddin2016/elasticsearch,pozhidaevak/elasticsearch,mortonsykes/elasticsearch,cwurm/elasticsearch,mapr/elasticsearch,diendt/elasticsearch,jprante/elasticsearch,PhaedrusTheGreek/elasticsearch,zkidkid/elasticsearch,coding0011/elasticsearch,elasticdog/elasticsearch,IanvsPoplicola/elasticsearch,strapdata/elassandra5-rc,naveenhooda2000/elasticsearch,geidies/elasticsearch,clintongormley/elasticsearch,jchampion/elasticsearch,nazarewk/elasticsearch,PhaedrusTheGreek/elasticsearch,HonzaKral/elasticsearch,wenpos/elasticsearch,dongjoon-hyun/elasticsearch,AndreKR/elasticsearch,artnowo/elasticsearch,mohit/elasticsearch,StefanGor/elasticsearch,nilabhsagar/elasticsearch,camilojd/elasticsearch,mmaracic/elasticsearch,yanjunh/elasticsearch,mapr/elasticsearch,vroyer/elassandra,nezirus/elasticsearch,ivansun1010/elasticsearch,StefanGor/elasticsearch,fred84/elasticsearch,ivansun1010/elasticsearch,davidvgalbraith/elasticsearch,nazarewk/elasticsearch,girirajsharma/elasticsearch,JackyMai/elasticsearch,s1monw/elasticsearch,strapdata/elassandra,spiegela/elasticsearch,gingerwizard/elasticsearch,ricardocerq/elasticsearch,geidies/elasticsearch,MisterAndersen/elasticsearch,elasticdog/elasticsearch,alexshadow007/elasticsearch,gfyoung/elasticsearch,rajanm/elasticsearch,dpursehouse/elasticsearch,mohit/elasticsearch,a2lin/elasticsearch,mjason3/elasticsearch,bawse/elasticsearch,winstonewert/elasticsearch,wbowling/elasticsearch,Helen-Zhao/elasticsearch,MaineC/elasticsearch,kalimatas/elasticsearch,tebriel/elasticsearch,martinstuga/elasticsearch,artnowo/elasticsearch,diendt/elasticsearch,mohit/elasticsearch,Helen-Zhao/elasticsearch,gingerwizard/elasticsearch,maddin2016/elasticsearch,elastic/elasticsearch-mapper-attachments,coding0011/elasticsearch,bjorn-ali-goransson/elasticsearch-mapper-attachments,fred84/elasticsearch,maddin2016/elasticsearch,martinstuga/elasticsearch,dongjoon-hyun/elasticsearch,JSCooke/elasticsearch,bornemix/elasticsearch-mapper-attachments,gingerwizard/elasticsearch,strapdata/elassandra,yynil/elasticsearch,mortonsykes/elasticsearch,elasticdog/elasticsearch,masaruh/elasticsearch,obourgain/elasticsearch,kaneshin/elasticsearch,glefloch/elasticsearch,ZTE-PaaS/elasticsearch,LewayneNaidoo/elasticsearch,obourgain/elasticsearch,JervyShi/elasticsearch,qwerty4030/elasticsearch,lks21c/elasticsearch,coding0011/elasticsearch,jchampion/elasticsearch,camilojd/elasticsearch,geidies/elasticsearch,AndreKR/elasticsearch,s1monw/elasticsearch,naveenhooda2000/elasticsearch,nezirus/elasticsearch,ZTE-PaaS/elasticsearch,wuranbo/elasticsearch,bawse/elasticsearch,ggchangan/elasticsearch-mapper-attachments,jpountz/elasticsearch,wbowling/elasticsearch,bawse/elasticsearch,martinstuga/elasticsearch,brandonkearby/elasticsearch,avikurapati/elasticsearch,strapdata/elassandra,yanjunh/elasticsearch,trangvh/elasticsearch,wangtuo/elasticsearch,jpountz/elasticsearch,nknize/elasticsearch,wuranbo/elasticsearch,kalimatas/elasticsearch,geidies/elasticsearch,henakamaMSFT/elasticsearch,AndreKR/elasticsearch,rmuir/elasticsearch-mapper-attachments,gfyoung/elasticsearch,Stacey-Gammon/elasticsearch,wbowling/elasticsearch,wuranbo/elasticsearch,Collaborne/elasticsearch-mapper-attachments,obourgain/elasticsearch,spiegela/elasticsearch,jprante/elasticsearch,HonzaKral/elasticsearch,njlawton/elasticsearch,awislowski/elasticsearch,geidies/elasticsearch,dpursehouse/elasticsearch,zkidkid/elasticsearch,markwalkom/elasticsearch,GlenRSmith/elasticsearch,ricardocerq/elasticsearch,strapdata/elassandra5-rc,artnowo/elasticsearch,tebriel/elasticsearch,dpursehouse/elasticsearch,mikemccand/elasticsearch,LeoYao/elasticsearch,Helen-Zhao/elasticsearch,brandonkearby/elasticsearch,umeshdangat/elasticsearch,nezirus/elasticsearch,MaineC/elasticsearch,rhoml/elasticsearch,umeshdangat/elasticsearch,Shepard1212/elasticsearch,scottsom/elasticsearch,HonzaKral/elasticsearch,martinstuga/elasticsearch,markwalkom/elasticsearch,wenpos/elasticsearch,mmaracic/elasticsearch,mjason3/elasticsearch,pozhidaevak/elasticsearch,naveenhooda2000/elasticsearch,uschindler/elasticsearch,zkidkid/elasticsearch,mortonsykes/elasticsearch,episerver/elasticsearch,uschindler/elasticsearch,elastic/elasticsearch-mapper-attachments,clintongormley/elasticsearch,andrejserafim/elasticsearch,nknize/elasticsearch,wbowling/elasticsearch,mmaracic/elasticsearch,ZTE-PaaS/elasticsearch,rmuir/elasticsearch,nezirus/elasticsearch,liweinan0423/elasticsearch,GlenRSmith/elasticsearch,episerver/elasticsearch,wenpos/elasticsearch,liweinan0423/elasticsearch,avikurapati/elasticsearch,C-Bish/elasticsearch,trangvh/elasticsearch,rmuir/elasticsearch,masaruh/elasticsearch,nknize/elasticsearch,robin13/elasticsearch,ZTE-PaaS/elasticsearch,F0lha/elasticsearch,elasticdog/elasticsearch,liweinan0423/elasticsearch,liweinan0423/elasticsearch,Helen-Zhao/elasticsearch,fforbeck/elasticsearch,spiegela/elasticsearch,a2lin/elasticsearch,alexshadow007/elasticsearch,jchampion/elasticsearch,spiegela/elasticsearch,girirajsharma/elasticsearch,gingerwizard/elasticsearch,coding0011/elasticsearch,sneivandt/elasticsearch,masaruh/elasticsearch,gmarz/elasticsearch,nknize/elasticsearch,davidvgalbraith/elasticsearch,s1monw/elasticsearch,fforbeck/elasticsearch,coding0011/elasticsearch,rhoml/elasticsearch,jimczi/elasticsearch,wbowling/elasticsearch,henakamaMSFT/elasticsearch,LeoYao/elasticsearch,a2lin/elasticsearch,fernandozhu/elasticsearch,rmuir/elasticsearch,C-Bish/elasticsearch,maddin2016/elasticsearch,camilojd/elasticsearch,jprante/elasticsearch,LeoYao/elasticsearch,mapr/elasticsearch,LeoYao/elasticsearch,rajanm/elasticsearch,girirajsharma/elasticsearch,markharwood/elasticsearch,brandonkearby/elasticsearch,snikch/elasticsearch,MisterAndersen/elasticsearch,scorpionvicky/elasticsearch,trangvh/elasticsearch,AndreKR/elasticsearch,qwerty4030/elasticsearch,AndreKR/elasticsearch,yanjunh/elasticsearch,PhaedrusTheGreek/elasticsearch,girirajsharma/elasticsearch,vroyer/elasticassandra,myelin/elasticsearch,spiegela/elasticsearch,MisterAndersen/elasticsearch,xuzha/elasticsearch,C-Bish/elasticsearch,myelin/elasticsearch,rmuir/elasticsearch,jpountz/elasticsearch,cwurm/elasticsearch,awislowski/elasticsearch,jbertouch/elasticsearch,nomoa/elasticsearch,jimczi/elasticsearch,camilojd/elasticsearch,zkidkid/elasticsearch,robin13/elasticsearch,vroyer/elasticassandra,strapdata/elassandra,AndreKR/elasticsearch,winstonewert/elasticsearch,ricardocerq/elasticsearch,dpursehouse/elasticsearch,nazarewk/elasticsearch,MaineC/elasticsearch,uschindler/elasticsearch,myelin/elasticsearch,strapdata/elassandra5-rc,LeoYao/elasticsearch,yanjunh/elasticsearch,ESamir/elasticsearch,MisterAndersen/elasticsearch,camilojd/elasticsearch,pozhidaevak/elasticsearch,markwalkom/elasticsearch,alexshadow007/elasticsearch,lks21c/elasticsearch,JervyShi/elasticsearch,brandonkearby/elasticsearch,i-am-Nathan/elasticsearch,robin13/elasticsearch,i-am-Nathan/elasticsearch,sneivandt/elasticsearch,tebriel/elasticsearch,alexshadow007/elasticsearch,JervyShi/elasticsearch,gfyoung/elasticsearch,wuranbo/elasticsearch,rlugojr/elasticsearch,geidies/elasticsearch,PhaedrusTheGreek/elasticsearch,MisterAndersen/elasticsearch,kaneshin/elasticsearch,avikurapati/elasticsearch,kaneshin/elasticsearch,tebriel/elasticsearch,F0lha/elasticsearch,vroyer/elasticassandra,rmuir/elasticsearch-mapper-attachments,nknize/elasticsearch,GlenRSmith/elasticsearch,ESamir/elasticsearch,diendt/elasticsearch,kalimatas/elasticsearch,pozhidaevak/elasticsearch,nilabhsagar/elasticsearch,nezirus/elasticsearch,jbertouch/elasticsearch,IanvsPoplicola/elasticsearch,nilabhsagar/elasticsearch,wbowling/elasticsearch,andrejserafim/elasticsearch,clintongormley/elasticsearch,polyfractal/elasticsearch,scorpionvicky/elasticsearch,scorpionvicky/elasticsearch,gmarz/elasticsearch,uschindler/elasticsearch,avikurapati/elasticsearch,ESamir/elasticsearch,ivansun1010/elasticsearch,umeshdangat/elasticsearch,rhoml/elasticsearch,sreeramjayan/elasticsearch,kaneshin/elasticsearch,liweinan0423/elasticsearch,qwerty4030/elasticsearch,pozhidaevak/elasticsearch,obourgain/elasticsearch,avikurapati/elasticsearch,scorpionvicky/elasticsearch,markharwood/elasticsearch,davidvgalbraith/elasticsearch,awislowski/elasticsearch,mmaracic/elasticsearch,JervyShi/elasticsearch,yanjunh/elasticsearch,yynil/elasticsearch,sneivandt/elasticsearch,JackyMai/elasticsearch,alexshadow007/elasticsearch,xuzha/elasticsearch,naveenhooda2000/elasticsearch,ESamir/elasticsearch,myelin/elasticsearch,yynil/elasticsearch,maddin2016/elasticsearch,yynil/elasticsearch,vroyer/elassandra,ThiagoGarciaAlves/elasticsearch,markharwood/elasticsearch,Collaborne/elasticsearch-mapper-attachments,mapr/elasticsearch,nazarewk/elasticsearch,Stacey-Gammon/elasticsearch,polyfractal/elasticsearch,xuzha/elasticsearch,episerver/elasticsearch,HonzaKral/elasticsearch,sreeramjayan/elasticsearch,awislowski/elasticsearch,strapdata/elassandra5-rc,polyfractal/elasticsearch,nilabhsagar/elasticsearch,elasticdog/elasticsearch,ESamir/elasticsearch,nomoa/elasticsearch,diendt/elasticsearch,jpountz/elasticsearch,ggchangan/elasticsearch-mapper-attachments,markharwood/elasticsearch,IanvsPoplicola/elasticsearch,episerver/elasticsearch,wangtuo/elasticsearch,strapdata/elassandra5-rc,rhoml/elasticsearch,diendt/elasticsearch,GlenRSmith/elasticsearch,bjorn-ali-goransson/elasticsearch-mapper-attachments,rmuir/elasticsearch,robin13/elasticsearch,cwurm/elasticsearch,nomoa/elasticsearch,PhaedrusTheGreek/elasticsearch,xuzha/elasticsearch,nomoa/elasticsearch,bornemix/elasticsearch-mapper-attachments,Stacey-Gammon/elasticsearch,fred84/elasticsearch,gfyoung/elasticsearch,LewayneNaidoo/elasticsearch,ivansun1010/elasticsearch,dongjoon-hyun/elasticsearch,glefloch/elasticsearch,mikemccand/elasticsearch,jprante/elasticsearch,rlugojr/elasticsearch,yynil/elasticsearch,shreejay/elasticsearch,naveenhooda2000/elasticsearch,njlawton/elasticsearch,LewayneNaidoo/elasticsearch,bawse/elasticsearch,rlugojr/elasticsearch,xuzha/elasticsearch,fred84/elasticsearch,kalimatas/elasticsearch,sneivandt/elasticsearch,ricardocerq/elasticsearch,jpountz/elasticsearch