fixed template loading with empty block group

Conflicts:
	Resources/public/dist/validation/types/block.js
Merge branch 'master' of git://github.com/sulu-cmf/SuluContentBundle into hotfix/empty-block

Conflicts:
	Resources/public/dist/validation/types/block.js
Merge pull request #260 from sulu-cmf/hotfix/empty-block

Fixed template loading with empty blocks