fix docs and add docs for event receiver firehose
fix docs and add docs for event receiver firehose

lcp0578/druid,cocosli/druid,liquidm/druid,wenjixin/druid,amikey/druid,taochaoqiang/druid,KurtYoung/druid,erikdubbelboer/druid,praveev/druid,optimizely/druid,yaochitc/druid-dev,qix/druid,Deebs21/druid,zhaown/druid,mghosh4/druid,implydata/druid,smartpcr/druid,himanshug/druid,noddi/druid,b-slim/druid,himanshug/druid,tubemogul/druid,KurtYoung/druid,cocosli/druid,nishantmonu51/druid,guobingkun/druid,premc/druid,KurtYoung/druid,gianm/druid,penuel-leo/druid,elijah513/druid,du00cs/druid,mrijke/druid,andy256/druid,noddi/druid,taochaoqiang/druid,Fokko/druid,se7entyse7en/druid,praveev/druid,monetate/druid,Fokko/druid,mangeshpardeshiyahoo/druid,gianm/druid,solimant/druid,gianm/druid,implydata/druid,zhihuij/druid,skyportsystems/druid,deltaprojects/druid,rasahner/druid,mrijke/druid,minewhat/druid,potto007/druid-avro,767326791/druid,wenjixin/druid,tubemogul/druid,OttoOps/druid,implydata/druid,amikey/druid,lcp0578/druid,fjy/druid,druid-io/druid,Kleagleguo/druid,praveev/druid,skyportsystems/druid,jon-wei/druid,haoch/druid,nvoron23/druid,knoguchi/druid,minewhat/druid,authbox-lib/druid,potto007/druid-avro,Deebs21/druid,liquidm/druid,metamx/druid,kevintvh/druid,Kleagleguo/druid,taochaoqiang/druid,potto007/druid-avro,767326791/druid,mghosh4/druid,implydata/druid,yaochitc/druid-dev,milimetric/druid,potto007/druid-avro,kevintvh/druid,smartpcr/druid,leventov/druid,Deebs21/druid,nishantmonu51/druid,nishantmonu51/druid,optimizely/druid,mrijke/druid,calliope7/druid,zhihuij/druid,fjy/druid,zhaown/druid,noddi/druid,zhihuij/druid,monetate/druid,michaelschiff/druid,Deebs21/druid,nvoron23/druid,optimizely/druid,kevintvh/druid,leventov/druid,wenjixin/druid,mangeshpardeshiyahoo/druid,eshen1991/druid,Fokko/druid,jon-wei/druid,potto007/druid-avro,leventov/druid,zhaown/druid,friedhardware/druid,druid-io/druid,b-slim/druid,milimetric/druid,se7entyse7en/druid,druid-io/druid,liquidm/druid,redBorder/druid,Kleagleguo/druid,mrijke/druid,skyportsystems/druid,pjain1/druid,winval/druid,rasahner/druid,mrijke/druid,haoch/druid,michaelschiff/druid,eshen1991/druid,optimizely/druid,guobingkun/druid,andy256/druid,knoguchi/druid,friedhardware/druid,kevintvh/druid,premc/druid,Fokko/druid,kevintvh/druid,metamx/druid,deltaprojects/druid,solimant/druid,gianm/druid,penuel-leo/druid,leventov/druid,yaochitc/druid-dev,Deebs21/druid,jon-wei/druid,mghosh4/druid,zengzhihai110/druid,deltaprojects/druid,liquidm/druid,pjain1/druid,qix/druid,redBorder/druid,redBorder/druid,deltaprojects/druid,michaelschiff/druid,tubemogul/druid,se7entyse7en/druid,taochaoqiang/druid,mghosh4/druid,haoch/druid,cocosli/druid,dclim/druid,skyportsystems/druid,lizhanhui/data_druid,lizhanhui/data_druid,milimetric/druid,mghosh4/druid,anupkumardixit/druid,metamx/druid,mangeshpardeshiyahoo/druid,monetate/druid,deltaprojects/druid,pdeva/druid,wenjixin/druid,penuel-leo/druid,nishantmonu51/druid,b-slim/druid,calliope7/druid,elijah513/druid,b-slim/druid,michaelschiff/druid,eshen1991/druid,andy256/druid,pjain1/druid,anupkumardixit/druid,du00cs/druid,zengzhihai110/druid,authbox-lib/druid,minewhat/druid,pjain1/druid,redBorder/druid,dclim/druid,zhihuij/druid,zhiqinghuang/druid,michaelschiff/druid,lizhanhui/data_druid,penuel-leo/druid,zxs/druid,cocosli/druid,mghosh4/druid,b-slim/druid,solimant/druid,mangeshpardeshiyahoo/druid,cocosli/druid,nvoron23/druid,767326791/druid,druid-io/druid,elijah513/druid,premc/druid,lizhanhui/data_druid,minewhat/druid,implydata/druid,noddi/druid,zengzhihai110/druid,deltaprojects/druid,nishantmonu51/druid,calliope7/druid,guobingkun/druid,zhiqinghuang/druid,dclim/druid,optimizely/druid,monetate/druid,Fokko/druid,pombredanne/druid,winval/druid,anupkumardixit/druid,praveev/druid,michaelschiff/druid,andy256/druid,dkhwangbo/druid,lcp0578/druid,lizhanhui/data_druid,zhiqinghuang/druid,pombredanne/druid,metamx/druid,dclim/druid,OttoOps/druid,zhihuij/druid,guobingkun/druid,qix/druid,yaochitc/druid-dev,metamx/druid,himanshug/druid,pombredanne/druid,amikey/druid,implydata/druid,monetate/druid,dkhwangbo/druid,monetate/druid,wenjixin/druid,calliope7/druid,knoguchi/druid,zhiqinghuang/druid,authbox-lib/druid,haoch/druid,pdeva/druid,du00cs/druid,authbox-lib/druid,fjy/druid,authbox-lib/druid,premc/druid,nishantmonu51/druid,himanshug/druid,KurtYoung/druid,qix/druid,winval/druid,nvoron23/druid,mghosh4/druid,lcp0578/druid,zhiqinghuang/druid,jon-wei/druid,zxs/druid,mangeshpardeshiyahoo/druid,zxs/druid,jon-wei/druid,du00cs/druid,tubemogul/druid,eshen1991/druid,elijah513/druid,767326791/druid,guobingkun/druid,lcp0578/druid,pdeva/druid,pdeva/druid,OttoOps/druid,OttoOps/druid,dclim/druid,solimant/druid,tubemogul/druid,gianm/druid,penuel-leo/druid,zengzhihai110/druid,druid-io/druid,taochaoqiang/druid,OttoOps/druid,premc/druid,calliope7/druid,noddi/druid,haoch/druid,zxs/druid,jon-wei/druid,fjy/druid,andy256/druid,anupkumardixit/druid,dkhwangbo/druid,dkhwangbo/druid,gianm/druid,himanshug/druid,pjain1/druid,Kleagleguo/druid,pombredanne/druid,se7entyse7en/druid,milimetric/druid,rasahner/druid,amikey/druid,pombredanne/druid,michaelschiff/druid,nvoron23/druid,knoguchi/druid,erikdubbelboer/druid,knoguchi/druid,zhaown/druid,nishantmonu51/druid,skyportsystems/druid,erikdubbelboer/druid,solimant/druid,eshen1991/druid,redBorder/druid,elijah513/druid,milimetric/druid,minewhat/druid,du00cs/druid,praveev/druid,smartpcr/druid,rasahner/druid,zhaown/druid,monetate/druid,friedhardware/druid,erikdubbelboer/druid,fjy/druid,winval/druid,pjain1/druid,yaochitc/druid-dev,zxs/druid,se7entyse7en/druid,smartpcr/druid,amikey/druid,deltaprojects/druid,friedhardware/druid,leventov/druid,gianm/druid,Kleagleguo/druid,qix/druid,Fokko/druid,jon-wei/druid,winval/druid,anupkumardixit/druid,dkhwangbo/druid,rasahner/druid,pdeva/druid,KurtYoung/druid,767326791/druid,zengzhihai110/druid,pjain1/druid,Fokko/druid,friedhardware/druid,smartpcr/druid,liquidm/druid,liquidm/druid,erikdubbelboer/druid