Update activity starter documentation
Update activity starter documentation

Change-Id: I4c16d0667ed9c37b2c3ae3b617ec6c3179ae6f86

jsheldonmit/appinventor-sources,awoodworth/appinventor-sources,bitsecure/appinventor1-sources,afmckinney/appinventor-sources,jisqyv/appinventor-sources,ZachLamb/appinventor-sources,mit-cml/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,krishc90/APP-INVENTOR,kannan-usf/AppInventorJavaBridge,tvomf/appinventor-mapps,gitars/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,jithinbp/appinventor-sources,CoderDojoLX/appinventor-sources,nickboucart/appinventor-sources,krishc90/APP-INVENTOR,weihuali0509/appinventor-sources,E-Hon/appinventor-sources,tatuzaumm/app-inventor2-custom,spefley/appinventor-sources,ram8647/appinventor-sources,farxinu/appinventor-sources,sujianping/appinventor-sources,dengxinyue0420/appinventor-sources,marksherman/appinventor-sources,gitars/appinventor-sources,weihuali0509/web-appinventor,youprofit/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,bxie/appinventor-sources,kannan-usf/AppInventorJavaBridge,toropeza/appinventor-sources,graceRyu/appinventor-sources,liyucun/appinventor-sources,doburaimo/appinventor-sources,liyucun/appinventor-sources,afmckinney/appinventor-sources,emeryotopalik/appinventor-sources,josmas/app-inventor,egiurleo/appinventor-sources,afmckinney/appinventor-sources,mark-friedman/web-appinventor,barreeeiroo/appinventor-sources,aouskaroui/appinventor-sources,CoderDojoLX/appinventor-sources,halatmit/appinventor-sources,fmntf/appinventor-sources,JalexChang/appinventor-sources,wanddy/appinventor-sources,hasi96/appinventor-sources,puravidaapps/appinventor-sources,frfranca/appinventor-sources,toropeza/appinventor-sources,emeryotopalik/appinventor-sources,KeithGalli/appinventor-sources,jisqyv/appinventor-sources,dengxinyue0420/appinventor-sources,halatmit/appinventor-sources,aouskaroui/appinventor-sources,jsheldonmit/appinventor-sources,tatuzaumm/app-inventor2-custom,puravidaapps/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,joshaham/latest_app_inventor,kannan-usf/AppInventorJavaBridge,joshaham/latest_app_inventor,youprofit/appinventor-sources,kkashi01/appinventor-sources,weihuali0509/appinventor-sources,kpjs4s/AppInventorJavaBridgeCodeGen,thilankam/appinventor-sources,mark-friedman/web-appinventor,egiurleo/appinventor-sources,Momoumar/appinventor-sources,lizlooney/appinventor-sources,mit-cml/appinventor-sources,fturbak/appinventor-sources,RachaelT/appinventor-sources,weihuali0509/web-appinventor,gitars/appinventor-sources,aouskaroui/appinventor-sources,ram8647/appinventor-sources,lizlooney/appinventor-sources,kpjs4s/AppInventorJavaBridgeCodeGen,dengxinyue0420/appinventor-sources,RachaelT/appinventor-sources,kkashi01/appinventor-sources,jisqyv/appinventor-sources,mark-friedman/web-appinventor,spefley/appinventor-sources,thilankam/appinventor-sources,dengxinyue0420/appinventor-sources,jithinbp/appinventor-sources,gitars/appinventor-sources,CoderDojoLX/appinventor-sources,wanddy/appinventor-sources,halatmit/appinventor-sources,Momoumar/appinventor-sources,mintingle/appinventor-sources,mit-dig/punya,nmcalabroso/appinventor-sources,marksherman/appinventor-sources,mintingle/appinventor-sources,mark-friedman/web-appinventor,jsheldonmit/appinventor-sources,jisqyv/appinventor-sources,liyucun/appinventor-sources,jsheldonmit/appinventor-sources,ewpatton/appinventor-sources,GodUseVPN/appinventor-sources,youprofit/appinventor-sources,bitsecure/appinventor1-sources,tiffanyle/appinventor-sources,wadleo/appinventor-sources,hasi96/appinventor-sources,Klomi/appinventor-sources,warren922/appinventor-sources,fturbak/appinventor-sources,JalexChang/appinventor-sources,kkashi01/appinventor-sources,ajcolter/appinventor-sources,ajcolter/appinventor-sources,mintingle/appinventor-sources,kkashi01/appinventor-sources,kpjs4s/AppInventorJavaBridgeCodeGen,jithinbp/appinventor-sources,kpjs4s/AppInventorJavaBridgeCodeGen,farxinu/appinventor-sources,tvomf/appinventor-mapps,josmas/app-inventor,mit-dig/punya,warren922/appinventor-sources,marksherman/appinventor-sources,lizlooney/appinventor-sources,weihuali0509/web-appinventor,youprofit/appinventor-sources,William-Byrne/appinventor-sources,fturbak/appinventor-sources,Mateopato/appinventor-sources,ZachLamb/appinventor-sources,fmntf/appinventor-sources,tiffanyle/appinventor-sources,thequixotic/appinventor-sources,Klomi/appinventor-sources,sujianping/appinventor-sources,puravidaapps/appinventor-sources,bitsecure/appinventor1-sources,farxinu/appinventor-sources,KeithGalli/appinventor-sources,egiurleo/appinventor-sources,CoderDojoLX/appinventor-sources,KeithGalli/appinventor-sources,nmcalabroso/appinventor-sources,aouskaroui/appinventor-sources,mark-friedman/web-appinventor,themadrobot/appinventor-sources,awoodworth/appinventor-sources,sujianping/appinventor-sources,farxinu/appinventor-sources,Momoumar/appinventor-sources,bxie/appinventor-sources,barreeeiroo/appinventor-sources,tvomf/appinventor-mapps,doburaimo/appinventor-sources,William-Byrne/appinventor-sources,RachaelT/appinventor-sources,mintingle/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,thequixotic/appinventor-sources,GodUseVPN/appinventor-sources,kannan-usf/AppInventorJavaBridge,warren922/appinventor-sources,krishc90/APP-INVENTOR,halatmit/appinventor-sources,krishc90/APP-INVENTOR,lizlooney/appinventor-sources,ewpatton/appinventor-sources,mintingle/appinventor-sources,kkashi01/appinventor-sources,fmntf/appinventor-sources,mit-cml/appinventor-sources,sujianping/appinventor-sources,thequixotic/appinventor-sources,toropeza/appinventor-sources,fmntf/appinventor-sources,tiffanyle/appinventor-sources,wadleo/appinventor-sources,bxie/appinventor-sources,E-Hon/appinventor-sources,frfranca/appinventor-sources,warren922/appinventor-sources,aouskaroui/appinventor-sources,josmas/app-inventor,nickboucart/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,thilankam/appinventor-sources,joshaham/latest_app_inventor,weihuali0509/web-appinventor,ajcolter/appinventor-sources,ram8647/appinventor-sources,Klomi/appinventor-sources,graceRyu/appinventor-sources,wanddy/appinventor-sources,mit-dig/punya,E-Hon/appinventor-sources,ZachLamb/appinventor-sources,KeithGalli/appinventor-sources,nmcalabroso/appinventor-sources,tvomf/appinventor-mapps,JalexChang/appinventor-sources,joshaham/latest_app_inventor,weihuali0509/appinventor-sources,bitsecure/appinventor1-sources,doburaimo/appinventor-sources,mintingle/appinventor-sources,Mateopato/appinventor-sources,frfranca/appinventor-sources,spefley/appinventor-sources,emeryotopalik/appinventor-sources,frfranca/appinventor-sources,E-Hon/appinventor-sources,bxie/appinventor-sources,mit-dig/punya,wanddy/appinventor-sources,barreeeiroo/appinventor-sources,toropeza/appinventor-sources,Momoumar/appinventor-sources,Mateopato/appinventor-sources,GodUseVPN/appinventor-sources,mit-cml/appinventor-sources,weihuali0509/web-appinventor,krishc90/APP-INVENTOR,ewpatton/appinventor-sources,awoodworth/appinventor-sources,marksherman/appinventor-sources,Klomi/appinventor-sources,RachaelT/appinventor-sources,tatuzaumm/app-inventor2-custom,ewpatton/appinventor-sources,warren922/appinventor-sources,bitsecure/appinventor1-sources,kpjs4s/AppInventorJavaBridgeCodeGen,hasi96/appinventor-sources,jisqyv/appinventor-sources,liyucun/appinventor-sources,frfranca/appinventor-sources,nickboucart/appinventor-sources,JalexChang/appinventor-sources,marksherman/appinventor-sources,fmntf/appinventor-sources,joshaham/latest_app_inventor,toropeza/appinventor-sources,ram8647/appinventor-sources,hasi96/appinventor-sources,graceRyu/appinventor-sources,fturbak/appinventor-sources,tvomf/appinventor-mapps,wadleo/appinventor-sources,youprofit/appinventor-sources,ram8647/appinventor-sources,emeryotopalik/appinventor-sources,ajcolter/appinventor-sources,spefley/appinventor-sources,Momoumar/appinventor-sources,ewpatton/appinventor-sources,afmckinney/appinventor-sources,hasi96/appinventor-sources,awoodworth/appinventor-sources,jithinbp/appinventor-sources,tiffanyle/appinventor-sources,josmas/app-inventor,thequixotic/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,themadrobot/appinventor-sources,wanddy/appinventor-sources,graceRyu/appinventor-sources,egiurleo/appinventor-sources,graceRyu/appinventor-sources,awoodworth/appinventor-sources,josmas/app-inventor,mit-dig/punya,jithinbp/appinventor-sources,fturbak/appinventor-sources,nmcalabroso/appinventor-sources,mit-cml/appinventor-sources,mit-dig/punya,RachaelT/appinventor-sources,themadrobot/appinventor-sources,mit-dig/punya,mit-cml/appinventor-sources,ZachLamb/appinventor-sources,halatmit/appinventor-sources,tiffanyle/appinventor-sources,liyucun/appinventor-sources,doburaimo/appinventor-sources,kannan-usf/AppInventorJavaBridge,wadleo/appinventor-sources,thilankam/appinventor-sources,ewpatton/appinventor-sources,halatmit/appinventor-sources,barreeeiroo/appinventor-sources,puravidaapps/appinventor-sources,tatuzaumm/app-inventor2-custom,nickboucart/appinventor-sources,jsheldonmit/appinventor-sources,tatuzaumm/app-inventor2-custom,wadleo/appinventor-sources,afmckinney/appinventor-sources,jisqyv/appinventor-sources,farxinu/appinventor-sources,nickboucart/appinventor-sources,William-Byrne/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,bxie/appinventor-sources,themadrobot/appinventor-sources,GodUseVPN/appinventor-sources,JalexChang/appinventor-sources,marksherman/appinventor-sources,Mateopato/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,Klomi/appinventor-sources,nmcalabroso/appinventor-sources,dengxinyue0420/appinventor-sources,E-Hon/appinventor-sources,Mateopato/appinventor-sources,KeithGalli/appinventor-sources,sujianping/appinventor-sources,kkashi01/appinventor-sources,thequixotic/appinventor-sources,barreeeiroo/appinventor-sources,William-Byrne/appinventor-sources,emeryotopalik/appinventor-sources,josmas/app-inventor,weihuali0509/appinventor-sources,thilankam/appinventor-sources,weihuali0509/appinventor-sources,ZachLamb/appinventor-sources,CoderDojoLX/appinventor-sources,William-Byrne/appinventor-sources,lizlooney/appinventor-sources,egiurleo/appinventor-sources,ajcolter/appinventor-sources,spefley/appinventor-sources,doburaimo/appinventor-sources,gitars/appinventor-sources,puravidaapps/appinventor-sources,GodUseVPN/appinventor-sources,themadrobot/appinventor-sources