[Work In Progress] Ruby 2.0.0-p195

This seems too easy - am I missing something?

[This comment](http://chocolatey.org/packages/ruby#comment-790703717) seems to suggest there needs to be an uninstall script. I guess that's probably it.

Side note: [there seems](http://rubyinstaller.org/downloads/) to be a x64 build for 2.0.0-p195 - should we be installing that for a 64-bit client?