Fix compilation issue with boost::optional not being writable to std::ostream in Mac OS X.
Fix compilation issue with boost::optional not being writable to std::ostream in Mac OS X.

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