[WIP] Upgrade to rails 4.1.X and other goodies

This PR is under progress, we need to test the app generation and deploy.

- [x] Update Gems
- [x] Make should-matchers working with spring
- [x] Generate a new app and works with integrate. Pending https://github.com/Helabs/jumpup/issues/35
- [x] Fix problem to deploy to heroku 


Will close #323