LUN-1169 -- changed cropduster models so it works with a FilerImageField
LUN-1169 -- hide fileds that should not confuse the user. The user has to set only the width and the height constrainst
LUN-1169 -- fixed a bug
LUN-1169 -- change the functionality when the Save button is pressed because a ewn filer image has to be created and returned to the snippet variable
LUN-1169 -- changes to work with FilerImageField
LUN-1169 -- method to upload the cropped image to filer: create the new filer image, upload it Clipboard, and move it to the folder of the original file
LUN-1169 -- changes to work with FilerImageField
LUN-1169 -- add dependency to django and django filer
LUN-1169 -- added migrations
LUN-1169 -- CROPDUSTER_UPLOAD_PATH is no more mandatory in settings.py because files are uploaded in filer
LUN-1169 -- pbs customized version
LUN-1169 -- croppping area should be maximum possible
LUN-1169 -- delete Clipboard item after its use
LUN-1169 -- added some comments
LUN-1169 -- removed comment
LUN-1169 -- fix ajax-loading display when Save button is pressed
LUN-1196 -- refactoring
Merge pull request #1 from pbs/LUN-1169

Lun 1169 -- changes for the cropduster app to work with FilerImageField