Added badges for Travis CI and Coveralls
Added todo
Updated comments and fixed phpcs
Added missing App::uses
Updated validation rules
Update to CakePHP 2.4.7
Refactoring: replaced hard coded values by constants
Added tests for ExamsController
Added missing fixtures
Updated DebugKit config: use default cache engine
Added fixtures
Updated config, setUp and tearDown of Controller Tests
Merge remote-tracking branch 'upstream/master'