implement mime type guesser factory (so it can be modified on a per project/server basis)
Highlight drop zone when dragging a media over
Implemented moving a media through drag-and-drop
fix for wrong highlighting in admin tree / page title / breadcrumbs...
check if pdf files still exists before transforming + do not fail on remote video xml
upgrade documentation + updates to make upgrading easier
added german translations
Merge pull request #61 from wimvds/feature/refactor-admin-menu

fix for wrong highlighting in admin tree / page title / breadcrumbs...