Test some different rubies on travis to see what happens
Update tests to use capybara methods instead of regex

This way, we're getting text as the user would see it.
See: https://github.com/jnicklas/capybara/issues/1341
Switch .rvmrc.example to now preferred .ruby-* files

Also recommend 2.0.0
Update documentation about supported rubies
Merge pull request #819 from carols10cents/ruby-2

Adds support and preference for Ruby 2.0.0