Updated release notes from v2.1.x branch
Updated release notes from v2.1.x branch

Qinusty/rethinkdb,mbroadst/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,JackieXie168/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,bchavez/rethinkdb,catroot/rethinkdb,grandquista/rethinkdb,jmptrader/rethinkdb,jmptrader/rethinkdb,mbroadst/rethinkdb,dparnell/rethinkdb,dparnell/rethinkdb,Qinusty/rethinkdb,bpradipt/rethinkdb,Qinusty/rethinkdb,catroot/rethinkdb,robertjpayne/rethinkdb,grandquista/rethinkdb,bpradipt/rethinkdb,bchavez/rethinkdb,JackieXie168/rethinkdb,niieani/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb,niieani/rethinkdb,Qinusty/rethinkdb,eliangidoni/rethinkdb,dparnell/rethinkdb,JackieXie168/rethinkdb,robertjpayne/rethinkdb,bpradipt/rethinkdb,mbroadst/rethinkdb,eliangidoni/rethinkdb,bchavez/rethinkdb,Qinusty/rethinkdb,dparnell/rethinkdb,eliangidoni/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,robertjpayne/rethinkdb,niieani/rethinkdb,eliangidoni/rethinkdb,bpradipt/rethinkdb,Qinusty/rethinkdb,niieani/rethinkdb,Qinusty/rethinkdb,niieani/rethinkdb,bchavez/rethinkdb,catroot/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,eliangidoni/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,JackieXie168/rethinkdb,dparnell/rethinkdb,bpradipt/rethinkdb,dparnell/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,dparnell/rethinkdb,robertjpayne/rethinkdb,dparnell/rethinkdb,grandquista/rethinkdb,Qinusty/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,jmptrader/rethinkdb,bchavez/rethinkdb,niieani/rethinkdb,catroot/rethinkdb,catroot/rethinkdb,catroot/rethinkdb,eliangidoni/rethinkdb,JackieXie168/rethinkdb,catroot/rethinkdb,bpradipt/rethinkdb,grandquista/rethinkdb,bpradipt/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,eliangidoni/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,bpradipt/rethinkdb,mbroadst/rethinkdb,robertjpayne/rethinkdb,niieani/rethinkdb,robertjpayne/rethinkdb,niieani/rethinkdb,grandquista/rethinkdb,bchavez/rethinkdb,eliangidoni/rethinkdb,bchavez/rethinkdb,catroot/rethinkdb,grandquista/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,bpradipt/rethinkdb,Qinusty/rethinkdb,dparnell/rethinkdb,jmptrader/rethinkdb