updated term_walker and changed to a switch statement to catch future omissions (c.f. Issue 749)
updated term_walker and changed to a switch statement to catch future omissions (c.f. Issue 749)

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