We need to vendor x64 versions of ruby 2.0, and install the appropriate sets of gems into both branches. Ruby 2.1 is not yet released on Windows.
The work here includes:
- create 2.0.0-x64 branch
- vendor ruby 2.0.0-p545 (x64) from rubyinstaller.org OR newer if they release a patched version
- upgrade/install gems for x64 versions