Updated to support OpenJPEG versions 1.5.2, 2.0.1, and 2.1.
Updated to support Python 3.4.
Cleaned up and refactored many tests.
Dropped some tests that were always skipped.
A couple of XML printing tests were commented out because of differences
between the ways that 2.6 and 2.6+ versions of ElementTree print XML.
A 2.6 installation will require one to install ordereddict and
unittest2.
