Starting Exif read support.
Added Exif classes for preliminary Exif image, photo, iop, gps support.
Just a comment.
No longer testing nemo directly.
Merge branch 'issue24'
Added Exif support.  Closes #11.
Merge branch 'issue11' into devel

Conflicts:
	docs/source/introduction.rst
Merge branch 'devel'
Merge branch 'master' of https://github.com/quintusdias/glymur
Merge branch 'master' into devel
Redoing fix that was somehow backed out?  Closes #18.
Merge branch 'issue18' into devel