Changed Parameter Type Hinting to only use the top level Abstract class
Merge pull request #55 from adam-vessey/7.x

Make derivative generation optional.
Change mimetype back.

"image/tiff" is correct... It's just our Mimedetect class which is/was
returning the incorrect mimetype.
Merge pull request #63 from adam-vessey/7.x-fix-mime

Change mimetype back.
Merge branch '7.x-fcrepo4' of git://github.com/nigelgbanks/islandora_solution_pack_large_image into 7.x-nigel-merge

Conflicts:
	includes/derivatives.inc
Merge pull request #64 from jonathangreen/7.x-nigel-merge

7.x nigel merge