Got basic image uploading working
Removed uploads from github :)
small error
Added a better image uploader button
Fixed some javascript placement errors and cleared up the edit form
Merge pull request #137 from boersmamarcel/newchallengesform

Newchallengesform
Removed old date picker
Merge pull request #138 from boersmamarcel/newchallengesform

Removed old date picker
Merged with master
Merged with master again
Fixed visible_for_user scope
Merged with master
Added fallback images and updated tests with images
Merge pull request #139 from boersmamarcel/challengeimage

Challenge image field and updated form (Tests done)