Merge pull request #33 from adam-vessey/7.x

Avoid usage of $datastream->content
djatoka only hits islandora once, not twice.
Merge pull request #37 from nhart/7.x

djatoka only hits islandora once, not twice.
Update islandora_large_image.module

apparently centos only uses the token once and ubuntu twice.
Merge pull request #39 from nhart/7.x

Update islandora_large_image.module
Prevent blindly creating a JPEG.

This was part of the problem with creating JPEG2000 images.
Improve JPEG-2000 generation.

Now, we have the option of decompressing TIFFs automatically, to
allow the usage of the usual Kakadu, in addition to some checks if
ImageMagick supports JPEG-2000s.