remove debug stmt
add ability for instructor to select a color for the card
update color palette
Merge pull request #54 from Harvard-ATG/feature/card-color

feature/card-color
card validation: image validation and ensuring that not all fields are empty
reorganizing validation code
functionality to upload images when uploading decks by specifying the paths of the images
functionality to upload images when uploading decks by specifying the paths of the images
when uploading decks, the images can be uploaded using both local paths and urls
testing image uploads
minor fixes
Delete Thumbs.db
minor fixes
minor fixes
Travis build fails with the localhost urls
Travis build fails with the localhost urls
Travis build fails with the localhost urls
Merge branch 'dev' into feature/card-validation
separate rendering and submitting of edit card form
separate rendering and submitting of edit card form