RSpec 3.x is not supported yet
Test on Ruby 2.1 as well
Merge pull request #122 from shepmaster/test-on-2.1

Test on Ruby 2.1
Disable Spinach in JRuby builds - it doesn't work there
Merge pull request #123 from shepmaster/disable-spinach

Disable Spinach in JRuby builds - it doesn't work there
Remove more vestiges of Ruby 1.8 support
Merge pull request #124 from shepmaster/remove-1.8

Remove more vestiges of Ruby 1.8 support
Only test with RSpec 2 style failures
Remove RSpec 1.x formatter methods
Remove RSpec 1.x failure wrapper
Remove RSpec 1.x requires