Make derivative generation optional.

By default, derivatives will only be generated if they do not already
exist on the given object. If it does exist, we do nothing.
Buildfile and doxyfile
Sed fix
Merge pull request #56 from daniel-dgi/7.x

Buildfile and doxyfile
Merge pull request #54 from philsogaDGI/7.x

Updated the dc composite xml file
Update islandora_large_image.info

Changed to have the proper solution pack name.
Add clipping to large image when seadragon is the viewer (ONTIME-1262).
Removal of dds.
7.x grammar fixes
Merge pull request #58 from daitken/7.x

7.x grammar fixes
Code styling and fixes per codereview.
Merge conflicts.
Merge pull request #57 from jordandukart/7.x

Add clipping to large image when seadragon is the viewer (ONTIME-1262).
change OBJ mime to tif, thus making batch_importer happy. avessey++ pmurray++
yank ORDERED attribute
Merge pull request #59 from ruebot/7.x

change OBJ mime to tif, thus making batch_importer happy. avessey++ pmur...
Changed Parameter Type Hinting to only use the top level Abstract class
Merge branch '7.x' of git://github.com/Islandora/islandora_solution_pack_large_image into 7.x

Conflicts:
	includes/derivatives.inc
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.