(RE-2180) Update to our build of ruby

This replaces the version of ruby 2.0.0 currently used, with one that
was built with our fork of the rubyinstaller. This includes an important
patch that we needed, as well as let's us maintain a more stable version
of that particular project. The ruby that this PR brings in is straight
from
http://jenkins-release.delivery.puppetlabs.net/job/WindowsRubyBuilds/51/RUBYVER=2.0.0-p481,label=win-build/