Add es6 generator call, apply, lift
Add es6 generator call, apply, lift

ning-github/when,ning-github/when,frank-weindel/when,SourcePointUSA/when,stevage/when,SourcePointUSA/when,anthonyvia/when,anthonyvia/when,caporta/when,DJDNS/when.js,tkirda/when,tkirda/when,mlennon3/when,frank-weindel/when,caporta/when,mlennon3/when,stevage/when,petkaantonov/when