Adding docstring to files.views.details function.
Using shortcut Django method to get file object from database.
Using unicode type instead of string type in files module.
Replaced undefined exception with TypeError exception.
Updating event log comments on Files module.
PEP8 File model.
Updating the image_rescale utility function to keep the image.format attribute.
Updated the files module to keep the image format of resized images.  (e.g. png is a png after being resized)
PEP8 on the Files model.
Resized images in the files module keep their extension

Images resized in the files module are now resized in their original format.  Image formats that can take advantage of this feature include of .gif, .jpg, and .png.
Merge branch 'master' of github.com:tendenci/tendenci