Adds docs for array difference.
Adds docs for array difference.

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