safe option will now always be set if a callback is given to a collection
safe option will now always be set if a callback is given to a collection

mafintosh/mongojs,saintedlama/mongojs,octoblu/mongojs,lionvs/mongojs,PaulinePro/mongojs,tapsboy/promised-mongo,AMKohn/mongojs,litixsoft/mongojs,kapetan/mongojs,Dcardcc/mongojs,JaKXz/promised-mongo,beni55/mongojs,gordonmleigh/promised-mongo,Dcard/mongojs