Add clipping to large image when seadragon is the viewer (ONTIME-1262).
Removal of dds.
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).
Merge remote-tracking branch 'upstream/7.x' into lyr-master