Add CKEditor browsing and uploading medias feature

Move all code to SonataFormatterBundle

Add a security check to check if SonataMediaBundle is loaded

Add a check for creation permission

Update header file

Update ivory ckeditor bundle usage

Update IvoryCKEditorBundle dependencie
Merge pull request #46 from eko/ckeditor

Add CKEditor browsing and uploading medias feature
Update composer.json to respect psr4
Update autoload.php.dist
Merge branch 'sonata-project/master'

Conflicts:
	composer.json