Remove iojs, since its node-gyp fails spectacularly on travis
Remove iojs, since its node-gyp fails spectacularly on travis

stevage/when,caporta/when,mlennon3/when,SourcePointUSA/when,frank-weindel/when,tkirda/when,SourcePointUSA/when,caporta/when,ning-github/when,ning-github/when,frank-weindel/when,mlennon3/when,stevage/when,tkirda/when