This was based on my experience on Ubuntu 12.04 LTS. Although ruby 1.9.3 was included by default, it lacked (at least) SSL support which lead bundle to choke on use of https in `source "https://rubygems.org/"` in the Gemfile.

Also, aren't there possible incompatibilities between ruby 1.9.x and ruby 2.0.0? If the code base supports both, I think RVM should be mandated to run the unit tests in both ruby 1.9.2 and/or 1.9.3 and ruby 2.0.0.

@robin850 What do you think?