renamed some files
refactored delete action and removed unused method and references
removed exception handler to let the ExceptionLister to handle exceptions
AlThemeChanger refactored to throw exceptions when something went wrong and added translations
removed TODOs because groups will not be implemented because the same job can be made by templates
renamed variable
added translations for missing methods and some tests for translate method
added new test to verify when an exception is thrown
added unit test for AlConfigurationRepositoryPropel object