Add Ruby 2.0 to travis list.  Also removing bundler from requirements
Fix RBX version name
Upgrade rdiscount to fix JRuby tests
Move to Ruby 2.0 and new .ruby-version files
Use a pure Ruby markdown library
Goodbye 1.8.7
Merge pull request #8 from ejfinneran/ruby2

Add Ruby 2 and remove Ruby 1.8.7 from the travis list