Bugfixes
sharing collection: added check for existing user and group ACE to
prevent duplicated ACE
Introducing the image-service switch
sharing collection: added check for existing user and group ACE to
prevent duplicated ACE
Merge remote-tracking branch 'origin/master'
Bugfix: Uploading a resource duplicated existing ACEs on VRA_images
Bugfixes: Sharing now also adds/removes ACE on VRA_images and resources
removed debugging util:log functions
Bugfixes for permissions and ACEs on 
- sharing
- uploading
- creating collections

Frontend update:
- sharing-dialog
Merge pull request #14 from ChiSamurai/master

Introducing the image-service-switch and bugfixes for sharing and uploading