Added comment about serializer_t::block_writes.
Added comment about serializer_t::block_writes.

RubenKelevra/rethinkdb,wojons/rethinkdb,wkennington/rethinkdb,KSanthanam/rethinkdb,RubenKelevra/rethinkdb,KSanthanam/rethinkdb,dparnell/rethinkdb,yaolinz/rethinkdb,tempbottle/rethinkdb,sbusso/rethinkdb,losywee/rethinkdb,sontek/rethinkdb,wkennington/rethinkdb,eliangidoni/rethinkdb,AntouanK/rethinkdb,ayumilong/rethinkdb,losywee/rethinkdb,greyhwndz/rethinkdb,gdi2290/rethinkdb,tempbottle/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,grandquista/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,tempbottle/rethinkdb,AntouanK/rethinkdb,marshall007/rethinkdb,alash3al/rethinkdb,AntouanK/rethinkdb,mbroadst/rethinkdb,spblightadv/rethinkdb,lenstr/rethinkdb,greyhwndz/rethinkdb,4talesa/rethinkdb,sebadiaz/rethinkdb,matthaywardwebdesign/rethinkdb,4talesa/rethinkdb,wujf/rethinkdb,captainpete/rethinkdb,victorbriz/rethinkdb,pap/rethinkdb,mcanthony/rethinkdb,mbroadst/rethinkdb,scripni/rethinkdb,4talesa/rethinkdb,catroot/rethinkdb,jesseditson/rethinkdb,urandu/rethinkdb,niieani/rethinkdb,losywee/rethinkdb,captainpete/rethinkdb,JackieXie168/rethinkdb,bchavez/rethinkdb,sebadiaz/rethinkdb,gavioto/rethinkdb,catroot/rethinkdb,catroot/rethinkdb,niieani/rethinkdb,Wilbeibi/rethinkdb,captainpete/rethinkdb,dparnell/rethinkdb,matthaywardwebdesign/rethinkdb,rrampage/rethinkdb,gdi2290/rethinkdb,pap/rethinkdb,bpradipt/rethinkdb,dparnell/rethinkdb,gavioto/rethinkdb,urandu/rethinkdb,alash3al/rethinkdb,niieani/rethinkdb,wojons/rethinkdb,sebadiaz/rethinkdb,alash3al/rethinkdb,mbroadst/rethinkdb,sbusso/rethinkdb,victorbriz/rethinkdb,matthaywardwebdesign/rethinkdb,jmptrader/rethinkdb,jesseditson/rethinkdb,rrampage/rethinkdb,sbusso/rethinkdb,alash3al/rethinkdb,bpradipt/rethinkdb,urandu/rethinkdb,4talesa/rethinkdb,sbusso/rethinkdb,bpradipt/rethinkdb,yakovenkodenis/rethinkdb,mbroadst/rethinkdb,sebadiaz/rethinkdb,sbusso/rethinkdb,JackieXie168/rethinkdb,pap/rethinkdb,victorbriz/rethinkdb,Qinusty/rethinkdb,bpradipt/rethinkdb,sontek/rethinkdb,mbroadst/rethinkdb,gavioto/rethinkdb,eliangidoni/rethinkdb,RubenKelevra/rethinkdb,robertjpayne/rethinkdb,lenstr/rethinkdb,wujf/rethinkdb,wujf/rethinkdb,urandu/rethinkdb,captainpete/rethinkdb,bpradipt/rethinkdb,catroot/rethinkdb,bpradipt/rethinkdb,scripni/rethinkdb,bchavez/rethinkdb,jesseditson/rethinkdb,Wilbeibi/rethinkdb,robertjpayne/rethinkdb,mcanthony/rethinkdb,grandquista/rethinkdb,wkennington/rethinkdb,scripni/rethinkdb,KSanthanam/rethinkdb,eliangidoni/rethinkdb,elkingtonmcb/rethinkdb,elkingtonmcb/rethinkdb,lenstr/rethinkdb,grandquista/rethinkdb,sontek/rethinkdb,catroot/rethinkdb,elkingtonmcb/rethinkdb,eliangidoni/rethinkdb,Qinusty/rethinkdb,losywee/rethinkdb,mcanthony/rethinkdb,tempbottle/rethinkdb,mcanthony/rethinkdb,scripni/rethinkdb,greyhwndz/rethinkdb,Qinusty/rethinkdb,matthaywardwebdesign/rethinkdb,bchavez/rethinkdb,ayumilong/rethinkdb,yakovenkodenis/rethinkdb,sebadiaz/rethinkdb,jmptrader/rethinkdb,KSanthanam/rethinkdb,matthaywardwebdesign/rethinkdb,pap/rethinkdb,tempbottle/rethinkdb,ayumilong/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb,losywee/rethinkdb,KSanthanam/rethinkdb,lenstr/rethinkdb,marshall007/rethinkdb,grandquista/rethinkdb,rrampage/rethinkdb,gavioto/rethinkdb,urandu/rethinkdb,Qinusty/rethinkdb,spblightadv/rethinkdb,ajose01/rethinkdb,Wilbeibi/rethinkdb,lenstr/rethinkdb,niieani/rethinkdb,yaolinz/rethinkdb,KSanthanam/rethinkdb,pap/rethinkdb,matthaywardwebdesign/rethinkdb,bchavez/rethinkdb,jesseditson/rethinkdb,JackieXie168/rethinkdb,yakovenkodenis/rethinkdb,jmptrader/rethinkdb,RubenKelevra/rethinkdb,gdi2290/rethinkdb,spblightadv/rethinkdb,victorbriz/rethinkdb,elkingtonmcb/rethinkdb,sontek/rethinkdb,wujf/rethinkdb,alash3al/rethinkdb,spblightadv/rethinkdb,mquandalle/rethinkdb,ajose01/rethinkdb,lenstr/rethinkdb,jesseditson/rethinkdb,spblightadv/rethinkdb,jesseditson/rethinkdb,niieani/rethinkdb,alash3al/rethinkdb,Qinusty/rethinkdb,wujf/rethinkdb,rrampage/rethinkdb,gavioto/rethinkdb,dparnell/rethinkdb,yaolinz/rethinkdb,wkennington/rethinkdb,wujf/rethinkdb,elkingtonmcb/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,rrampage/rethinkdb,Qinusty/rethinkdb,losywee/rethinkdb,greyhwndz/rethinkdb,wkennington/rethinkdb,spblightadv/rethinkdb,ayumilong/rethinkdb,marshall007/rethinkdb,RubenKelevra/rethinkdb,mbroadst/rethinkdb,bpradipt/rethinkdb,AntouanK/rethinkdb,elkingtonmcb/rethinkdb,ajose01/rethinkdb,gdi2290/rethinkdb,robertjpayne/rethinkdb,tempbottle/rethinkdb,mquandalle/rethinkdb,gavioto/rethinkdb,spblightadv/rethinkdb,captainpete/rethinkdb,jmptrader/rethinkdb,bchavez/rethinkdb,robertjpayne/rethinkdb,lenstr/rethinkdb,sontek/rethinkdb,Qinusty/rethinkdb,greyhwndz/rethinkdb,scripni/rethinkdb,matthaywardwebdesign/rethinkdb,losywee/rethinkdb,yaolinz/rethinkdb,victorbriz/rethinkdb,bchavez/rethinkdb,mquandalle/rethinkdb,elkingtonmcb/rethinkdb,rrampage/rethinkdb,spblightadv/rethinkdb,yaolinz/rethinkdb,Wilbeibi/rethinkdb,ayumilong/rethinkdb,pap/rethinkdb,ajose01/rethinkdb,scripni/rethinkdb,greyhwndz/rethinkdb,elkingtonmcb/rethinkdb,rrampage/rethinkdb,wojons/rethinkdb,sbusso/rethinkdb,4talesa/rethinkdb,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