changed Gemfile back
Updating Gem in dummy rails app
Ignore all Gemfile.lock in dummy app
Changes to make travis run.
Tested with:
export RAILS_VERSION=3.1.0 ; rm Gemfile.lock ; bundle install && bundle exec rake RAILS_ENV=test
export RAILS_VERSION=3.2.0 ; rm Gemfile.lock ; bundle install && bundle exec rake RAILS_ENV=test
export RAILS_VERSION=4.0.0 ; rm Gemfile.lock ; bundle install && bundle exec rake RAILS_ENV=test
export RAILS_VERSION=4.1.0 ; rm Gemfile.lock ; bundle install && bundle exec rake RAILS_ENV=test