setup appraisal
change travis setup
strip off detect_rails_version
fix travis_cache
Try out the new beta build environment

- removed the time tags (this is built into Travis)
- use the new LXC build env on EC2
- use built in caching
don't bundle install the dev group

and make sure we bundle update
remove travis_cache
fix rails version detection
temp disable i18n specs
remove all test for a fast run