removed serializer
fixed typo
fixed testcases
Merge pull request #206 from sulu-cmf/hotfix/content-type-serialize

[HOTFIX] Removed serializer to serialize content nodes (preview)
Update composer.json
Update composer.json
Update composer.json
Merge branch 'master' of git://github.com/sulu-cmf/SuluContentBundle into develop

Conflicts:
	composer.json