Add ruby2.0 for travis-ci, and allow failures
Removed X flag from images.

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>
Merge branch 'feature/travis-ruby-2-0' of https://github.com/sanemat/fulcrum into sanemat-feature/travis-ruby-2-0
Update transitions gem for Ruby 2.0.0 support
Remove allow_failures from Ruby 2.0.0 travis conf