Merge branch 'master' into devel
Added __repr__ for JPEG2000SignatureBox, FileTypeBox.
Adding XMP UUID write support.  Still needs tests.  #104
added __repr__ for colr, cdef, ihdr boxes.  #133
Added jp2h __repr__ method.  #133
Added support for jplh, jpch, cmap, res , resd, resc  #133
Added 'url ', 'lbl ' box support.  #133
Added ulst and uinf repr support.  #133
Proper repr support for SIZ segment.  SIZ segment constructor change.

The SIZ segment was taking raw buffer arguments, which are difficult
for eval(repr()) to deal with, so the constructor was changed to make
the arguments more explicit. #133
Added repr support for Jp2k class.  #133
Added proper repr support for association box.  #133
The palette box now returns a regular numpy array.  Closes #135

Simplifies the code quite a bit.  Palette boxes seem to be quite rare.
Merge branch 'issue135' into devel
Changed nemo.jp2 to have a single XMP UUID.  #104
Merge branch 'devel' into issue104
Refactored Exif uuid code to separate subpackage.  #104
Refactored UUID handling.  #104

New classes for each type in _uuid_io sub package.
Made Exif handling more resilient.  #104
Pylint issues, #104
Added big endian Exif support.  #104