Rename metadata into metadata_backend
add checking exists and delete
rename parameter and add function generate_filename
Merge pull request #35 from SeiryuZ/metadata-backend

Rename metadata into metadata_backend
Revert "rename parameter and add function generate_filename"

This reverts commit 7d7afd0e843f07262886b959c276415320bcec58.
check file name from backend
add method get_filename
start test
edit test
change import
move get_path(), and modify if statement
Merge pull request #40 from SeiryuZ/master

Raise value error on non-existant source image
Gallery object should now raise ValueError if user tries to create
a thumbnail from an empty image field.
Return falsy Thumnbnail if no source image is supplied

1. Raise ValueError with surpressed attribute on Thumbnail requiring metadata
2. Fix human readable output of Thumbnail class representation __repr__
3. Added test to validate error surppression in template and raises correctly anywhere else
Merge branch 'master' into fix-error-not-surpressed

Conflicts:
	thumbnails/files.py
Fixed test for AttributeError
Separate test for thumbnails without source
Merge pull request #36 from jessicarasidi/storage_exists_delete

add checking exists and delete
Added "set_quality" image processor.
Mimic django ImageField's behaviour