SignalProducer.lift: added note warning that the implementation will start the receiver of the operator right away
SignalProducer.lift: added note warning that the implementation will start the receiver of the operator right away

ReactiveCocoa/ReactiveSwift,calebd/ReactiveCocoa,sandyway/ReactiveCocoa,tzongw/ReactiveCocoa,calebd/ReactiveCocoa,yonekawa/ReactiveCocoa,smilypeda/ReactiveCocoa,andersio/ReactiveCocoa,rpowelll/ReactiveCocoa,rpowelll/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,ohwutup/ReactiveCocoa,walkingsmarts/ReactiveCocoa,kevin-zqw/ReactiveCocoa,tonyarnold/ReactiveCocoa,victorlin/ReactiveCocoa,walkingsmarts/ReactiveCocoa,llb1119/test,ikesyo/ReactiveCocoa,ohwutup/ReactiveCocoa,smilypeda/ReactiveCocoa,ikesyo/ReactiveCocoa,Juraldinio/ReactiveCocoa,calebd/ReactiveCocoa,kevin-zqw/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,ohwutup/ReactiveCocoa,victorlin/ReactiveCocoa,tzongw/ReactiveCocoa,walkingsmarts/ReactiveCocoa,yonekawa/ReactiveCocoa,Juraldinio/ReactiveCocoa,paulyoung/ReactiveCocoa,tonyarnold/ReactiveCocoa,yonekawa/ReactiveCocoa,Farteen/ReactiveCocoa,Juraldinio/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,ReactiveCocoa/ReactiveSwift,Farteen/ReactiveCocoa,andersio/ReactiveCocoa,sandyway/ReactiveCocoa,Farteen/ReactiveCocoa,tzongw/ReactiveCocoa,andersio/ReactiveCocoa,kevin-zqw/ReactiveCocoa,rpowelll/ReactiveCocoa,paulyoung/ReactiveCocoa,natestedman/ReactiveCocoa,smilypeda/ReactiveCocoa,llb1119/test,paulyoung/ReactiveCocoa,victorlin/ReactiveCocoa,sandyway/ReactiveCocoa,natestedman/ReactiveCocoa,llb1119/test,tonyarnold/ReactiveCocoa,natestedman/ReactiveCocoa,RuiAAPeres/ReactiveCocoa