Improved icns support
Removed print statements.
Merging JPEG 2000 support with .icns plugin.
Added JPEG 2000 support for .icns files.
The JPEG plug-in will seek the stream if it's an fd, so change to using an io.BytesIO.
Added some tests and a couple of icns files.
Fixed a pre-existing Python 3 bug.
Merge branch 'icns-support' into icns+jp2k
Merge branch 'master' into icns+jp2k
Updated icons.
Merge branch 'master' into icns+jp2k
Made JPEG2K support for  files conditional on its inclusion in pillow build.  Added a JPEG2K icon test.
Merge JPEG 2000 icon support.
Merge branch 'master' into icns-support
Fixed a silly mistake.
Merge pull request #565 from al45tair/icns-support

Improved icns support