Switched to ruby 2.0.0-p0. Added simplecov for code coverage.
Added tests for metrics create and update methods when they fall validation.
Double quotes changed to single quotes for test method names.
Added validation for tariff values fields. Test updated and added few more for validation fail cases.
Changed test name accordingly with new Tariff method name
All test names now in single quotes.
Added more tests for report model.
Added devise gem for authentication.  Added link for login and logout to navigation bar. Default devise user model extended with first_name and last_name fields.
Authentication redirect moved changed from welcome_controller check to before_filter in a application_controller.
Fixed tests. Added test to check redirect to login form if no user logged in.