Adding options to the fill filter
Added optional configuration variable for whether the fill should merge the background
Always preserving exif info when saving the original in storage
Made fill transparent a parameter instead of a config setting
Merge pull request #1 from ppatriotis/filter/fill-fix

Made fill transparent a parameter instead of a config setting
Merge pull request #250 from prolificinteractive/filter/fill-fix

Allow Fill filter to fill the background of image
Resets Exif Orientation after reorientating image if RESPECT_ORIENTATION is True
Better tests for the fill filter
Bumping Pillow dependency, fixes #248
Fill filter compatible with other engines
Fix travis CI builds