Update readme with javascript error reporting
Update readme with javascript error reporting

I've added description how to setup airbrake-js to log javascript errors
in errbit and how one can test v3 api using airbrake ruby client.

ndlib/errbit,pallan/errbit,stevecrozz/errbit,sinrutina/errbit,bengler/errbit,fireho/errbit,errbit/errbit,assetricity/errbit,shyftplan/errbit,CarlosCD/errbit,mvz/errbit,mikk150/errbit,salemove/errbit,ndlib/errbit,projectdx/errbit,threatsim/errbit,espnbr/errbit,iFixit/errbit,mak-it/errbit,Stackato-Apps/errbit,Stackato-Apps/errbit,rud/errbit,shyftplan/errbit,alphagov/errbit,bonanza-market/errbit,startdatelabs/errbit,disvelop/errbit,fxposter/errbit,alphagov/errbit,steveyken/errbit,subvisual/errbit,mvz/errbit,stevecrozz/errbit,dwilkie/errbit,steveyken/errbit,disvelop/errbit,startdatelabs/errbit,huangxiangdan/errbit,rud/errbit,wombatsecurity/errbit,notch8/errbit,3zcurdia/errbit,pallan/errbit,gravity-platform/errbit,sinrutina/errbit,steveyken/errbit,burningpony/errbit,micred/errbit,vinco/errbit,salemove/errbit,Cloud-Temple/errbit,Promptus/errbit,rightscale/errbit,jordoh/errbit,huangxiangdan/errbit,peertransfer/errbit,sideci-sample/sideci-sample-errbit,dwilkie/errbit,projectdx/errbit,CarlosCD/errbit,alphagov/errbit,dwilkie/errbit,mak-it/errbit,francetv/errbit,openSUSE/errbit,errbit/errbit,jordoh/errbit,fxposter/errbit,openSUSE/errbit,CarlosCD/errbit,ZeusWPI/errbit,diowa/errbit,notch8/errbit,bonanza-market/errbit,assetricity/errbit,ninech/errbit,Cloud-Temple/errbit,threatsim/errbit,griff/errbit,3zcurdia/errbit,fusco/errbit,lucianosousa/errbit,peertransfer/errbit,Promptus/errbit,mikk150/errbit,ndlib/errbit,sideci-sample/sideci-sample-errbit,fusco/errbit,Cloud-Temple/errbit,fusco/errbit,francetv/errbit,wombatsecurity/errbit,threatsim/errbit,cognoa/errbit,alphagov/errbit,linki/errbit,huangxiangdan/errbit,diowa/errbit,vinco/errbit,wombatsecurity/errbit,iFixit/errbit,espnbr/errbit,lucianosousa/errbit,Promptus/errbit,griff/errbit,fireho/errbit,Strnadj/errbit,cognoa/errbit,startdatelabs/errbit,ZeusWPI/errbit,Strnadj/errbit,fxposter/errbit,stevecrozz/errbit,shyftplan/errbit,espnbr/errbit,burningpony/errbit,mvz/errbit,bengler/errbit,rightscale/errbit,assetricity/errbit,threatsim/errbit,fireho/errbit,mikk150/errbit,openSUSE/errbit,ninech/errbit,subvisual/errbit,gravity-platform/errbit,cognoa/errbit,gravity-platform/errbit,vinco/errbit,rud/errbit,linki/errbit,micred/errbit,diowa/errbit,ZeusWPI/errbit,bonanza-market/errbit,micred/errbit,griff/errbit,notch8/errbit,subvisual/errbit,3zcurdia/errbit,Stackato-Apps/errbit,subvisual/errbit,mak-it/errbit,disvelop/errbit,linki/errbit,jaronkk/errbit,bengler/errbit,wombatsecurity/errbit,projectdx/errbit,salemove/errbit,peertransfer/errbit,ninech/errbit,errbit/errbit,sinrutina/errbit,jaronkk/errbit,burningpony/errbit,Strnadj/errbit,rightscale/errbit,jaronkk/errbit,francetv/errbit,lucianosousa/errbit,jordoh/errbit,iFixit/errbit