Changes on gems versions
Config files and using 'protected_attributes' temp.
travis support.
fix for "rspec: command not found" on Travis
Application.config.secret_key_base to avoid warning.
Remove 'protected_attributes' and cleaning it up.

"`attr_accessible` is extracted out of Rails into a gem."
Better specs
Adding 'shoulda-matchers'
Specifying dataType.
Annotating models.
Readme update.
Adding coveralls
Update README.md

Being seek by alargatupene.orgy
Merge pull request #1 from edymerchk/update-to-rails-4

Update to rails 4 - Thx @esbanarango