Merge pull request #39 from tickit-project/feature/domain-object-collection-decorator

Adding domain object collection decorator to ease object decoration
Starting to refactor avatar classes
Fixing ApiControllerTest avatar reference
Adding more tests for AvatarExtension
Add test for twig extension name
Use avatar adapter class defined in config
Fix user API controller dependencies
Merge pull request #43 from tickit-project/feature/refactoring-avatar-service

Refactoring avatar classes
Merge branch 'development' into feature/client-bundle
Adding Client::setId() method
Adding ClientController::editAction() method and tests
Adding ClientController::deleteAction() method
Importing ParamConverter for ClientController
Adding TemplateController for client bundle