Added async client.
Added async client.

ronaldevers/raven-python,JackDanger/sentry,alex/raven,jean/sentry,smarkets/raven-python,ticosax/opbeat_python,smarkets/raven-python,hzy/raven-python,daevaorn/sentry,NickPresta/sentry,Goldmund-Wyldebeast-Wunderliebe/raven-python,gg7/sentry,korealerts1/sentry,looker/sentry,ewdurbin/sentry,drcapulet/sentry,argonemyth/sentry,JamesMura/sentry,imankulov/sentry,korealerts1/sentry,argonemyth/sentry,Kryz/sentry,akalipetis/raven-python,JackDanger/sentry,ewdurbin/raven-python,dirtycoder/opbeat_python,jokey2k/sentry,llonchj/sentry,JamesMura/sentry,rdio/sentry,dbravender/raven-python,ifduyue/sentry,wong2/sentry,inspirehep/raven-python,nikolas/raven-python,vperron/sentry,Natim/sentry,gg7/sentry,BuildingLink/sentry,primepix/django-sentry,dcramer/sentry-old,jmagnusson/raven-python,Photonomie/raven-python,recht/raven-python,JTCunning/sentry,icereval/raven-python,gg7/sentry,looker/sentry,akalipetis/raven-python,beni55/sentry,alex/sentry,patrys/opbeat_python,openlabs/raven,beniwohli/apm-agent-python,tbarbugli/sentry_fork,someonehan/raven-python,jmagnusson/raven-python,dirtycoder/opbeat_python,jbarbuto/raven-python,Natim/sentry,percipient/raven-python,hzy/raven-python,mitsuhiko/raven,danriti/raven-python,kevinlondon/sentry,ifduyue/sentry,wujuguang/sentry,beni55/sentry,nikolas/raven-python,Kronuz/django-sentry,SilentCircle/sentry,Kronuz/django-sentry,nicholasserra/sentry,alex/sentry,jokey2k/sentry,percipient/raven-python,vperron/sentry,alexm92/sentry,nikolas/raven-python,beniwohli/apm-agent-python,felixbuenemann/sentry,beniwohli/apm-agent-python,patrys/opbeat_python,danriti/raven-python,someonehan/raven-python,ewdurbin/sentry,JamesMura/sentry,zenefits/sentry,johansteffner/raven-python,ifduyue/sentry,SilentCircle/sentry,ngonzalvez/sentry,fuziontech/sentry,jokey2k/sentry,lepture/raven-python,JamesMura/sentry,tbarbugli/sentry_fork,jbarbuto/raven-python,JTCunning/sentry,percipient/raven-python,songyi199111/sentry,mitsuhiko/raven,nicholasserra/sentry,fuziontech/sentry,ifduyue/sentry,jmagnusson/raven-python,someonehan/raven-python,Natim/sentry,jean/sentry,dcramer/sentry-old,TedaLIEz/sentry,ticosax/opbeat_python,kevinlondon/sentry,Goldmund-Wyldebeast-Wunderliebe/raven-python,1tush/sentry,korealerts1/sentry,Photonomie/raven-python,beni55/sentry,ronaldevers/raven-python,Photonomie/raven-python,SilentCircle/sentry,alexm92/sentry,camilonova/sentry,jbarbuto/raven-python,smarkets/raven-python,vperron/sentry,rdio/sentry,nikolas/raven-python,songyi199111/sentry,mvaled/sentry,ewdurbin/raven-python,lopter/raven-python-old,BuildingLink/sentry,kevinlondon/sentry,boneyao/sentry,1tush/sentry,danriti/raven-python,tarkatronic/opbeat_python,drcapulet/sentry,akalipetis/raven-python,primepix/django-sentry,patrys/opbeat_python,daikeren/opbeat_python,fuziontech/sentry,chayapan/django-sentry,ewdurbin/sentry,gencer/sentry,wujuguang/sentry,recht/raven-python,BayanGroup/sentry,ngonzalvez/sentry,getsentry/raven-python,zenefits/sentry,WoLpH/django-sentry,jmp0xf/raven-python,beeftornado/sentry,beeftornado/sentry,drcapulet/sentry,JTCunning/sentry,hzy/raven-python,smarkets/raven-python,zenefits/sentry,getsentry/raven-python,WoLpH/django-sentry,camilonova/sentry,ronaldevers/raven-python,zenefits/sentry,inspirehep/raven-python,chayapan/django-sentry,argonemyth/sentry,Kronuz/django-sentry,mitsuhiko/sentry,primepix/django-sentry,SilentCircle/sentry,johansteffner/raven-python,llonchj/sentry,akheron/raven-python,daikeren/opbeat_python,NickPresta/sentry,jmp0xf/raven-python,icereval/raven-python,JamesMura/sentry,boneyao/sentry,mvaled/sentry,tarkatronic/opbeat_python,recht/raven-python,hongliang5623/sentry,mitsuhiko/sentry,imankulov/sentry,dirtycoder/opbeat_python,NickPresta/sentry,looker/sentry,camilonova/sentry,felixbuenemann/sentry,felixbuenemann/sentry,gencer/sentry,chayapan/django-sentry,kevinastone/sentry,daikeren/opbeat_python,WoLpH/django-sentry,looker/sentry,pauloschilling/sentry,pauloschilling/sentry,jbarbuto/raven-python,getsentry/raven-python,hongliang5623/sentry,alex/sentry,icereval/raven-python,looker/sentry,arthurlogilab/raven-python,BayanGroup/sentry,dcramer/sentry-old,dbravender/raven-python,fotinakis/sentry,BuildingLink/sentry,hongliang5623/sentry,Goldmund-Wyldebeast-Wunderliebe/raven-python,patrys/opbeat_python,gencer/sentry,TedaLIEz/sentry,songyi199111/sentry,icereval/raven-python,nicholasserra/sentry,wujuguang/sentry,inspirehep/raven-python,zenefits/sentry,arthurlogilab/raven-python,daevaorn/sentry,akheron/raven-python,kevinastone/sentry,BuildingLink/sentry,daevaorn/sentry,pauloschilling/sentry,BuildingLink/sentry,wong2/sentry,daevaorn/sentry,1tush/sentry,imankulov/sentry,inspirehep/raven-python,ngonzalvez/sentry,rdio/sentry,jean/sentry,mvaled/sentry,mvaled/sentry,lepture/raven-python,arthurlogilab/raven-python,NickPresta/sentry,boneyao/sentry,BayanGroup/sentry,gencer/sentry,ifduyue/sentry,jean/sentry,fotinakis/sentry,lepture/raven-python,wong2/sentry,TedaLIEz/sentry,dbravender/raven-python,collective/mr.poe,Kryz/sentry,alexm92/sentry,beeftornado/sentry,llonchj/sentry,ewdurbin/raven-python,fotinakis/sentry,gencer/sentry,Kryz/sentry,tbarbugli/sentry_fork,johansteffner/raven-python,mvaled/sentry,arthurlogilab/raven-python,mvaled/sentry,beniwohli/apm-agent-python,fotinakis/sentry,akheron/raven-python,ticosax/opbeat_python,rdio/sentry,jmp0xf/raven-python,jean/sentry,Goldmund-Wyldebeast-Wunderliebe/raven-python,JackDanger/sentry,kevinastone/sentry,tarkatronic/opbeat_python