make media public folder configurate able
fixes #618 media public folder for tests
add changelog
Merge pull request #622 from sulu-cmf/hotfix/617-master-request-listener

fixed request listener for sub requests
Merge branch 'enhancement/618-media-public-folder'
updated changelog
Merge branch 'develop'

Conflicts:
	CHANGELOG.md
Merge branch 'master' into develop
Merge branch 'develop' of git://github.com/sulu-cmf/sulu into develop