AppVeyor hack for installing Bundler
AppVeyor hack for installing Bundler

Based on https://twitter.com/appveyor/status/579981680020234240.

telekomatrix/ruby-ll,YorickPeterse/ruby-ll,telekomatrix/ruby-ll,YorickPeterse/ruby-ll,telekomatrix/ruby-ll,YorickPeterse/ruby-ll,telekomatrix/ruby-ll,YorickPeterse/ruby-ll