added onDelete's to Entities
fixed bug, when getting extension of file with no extension
removed click row in files table
added emptx message to sync
Merge branch 'master' of https://github.com/develo13/WANMedienFTPBundle

Conflicts:
	src/WAN/MedienFTPBundle/Resources/public/css/style.css
	src/WAN/MedienFTPBundle/Resources/views/Media/sync.html.twig

changed empty sync message