Catch only ImportError when trying PIL imports
Make setup.py executable
Update the github url for the project
Implement a way to preserve the original image ratio

ImageWithThumbsField now accepts the preserve_ratio flag. If set to
True, generated thumbnails will respect the original image's ratio.
preserve_ratio is set to False by default for backwards compatibility
reasons.

Fixes issue #4. based on a patch by Gaurav Kumar.
Add myself to AUTHORS
In DEBUG mode, re-raise any exception we get during thumbnail operations
Get the thumbnail url properly from the storage, instead of using s&r

This fixes an issue with storage backends that have other file-specific
attributes in the url, such as S3's signatures.
Merge pull request #6 from Adys/master

Implement a way to preserve the original image ratio + minor fixes