refactored directory structure and introduced AbstractDoctrineFieldDesriptor
removed old files
implemented FieldDescriptor for concatenating fields
corrected tests
Merge branch 'feature/list-concat-fields' into develop
added TemplatedUriBundle dependency in composer
reordered parameters
Merge pull request #146 from sulu-cmf/feature/parameter-order

[FEATURE] reordered parameters for FieldDescriptors
corrected passing of parameters to AbstractFielDescriptor
Merge branch 'develop' into feature/sort-fields

Conflicts:
	src/Sulu/Component/Rest/ListBuilder/Doctrine/FieldDescriptor/DoctrineFieldDescriptor.php