Update Controller/RestFormHelper.php

added "USE" for "Response" class
Update Controller/RestFormController.php

added "USE" for "Response" class
EncoderRegistry method signatures compatible with symfony EncoderInterface/DecoderInterface
Merge pull request #35 from hashnz/encoder_registry

EncoderRegistry method signatures compatible with symfony EncoderInterfa...
Merge pull request #33 from Metabor/master

Missing "USE" statemant
Update the minimum Symfony requirements
Removed depreciated methods in Form with their new versions (getChildren() and hasAttribute())
If the request is a PATCH then only include specified fields, since Symfony will be using $clearMissing behind the scenes.
Corrected dependencies
Merge pull request #36 from ccapndave/symfony-2.3.1-support

Symfony 2.3.1 support
Fix #36
made EncoderRegistry compatible with symfony serializer master