Initial conversion of ImageRegistration to Python3 using the 2to3 tool.  Continues to pass Python2 tests.  Issues in Eclipse are preventing Python 3 based tests.
Many fixes for porting nornir_imageregistration to python3
Update setup for python 3
Update ez_setup version
Re-add file for enums that was deleted during port
Rename file
Added concept of bounding box
Add classifiers to setup.
Update version history
Support direct indexing of rectangle and bounding box classes to obtain coordinates
Cleaned up imports.  Visual Studio was having trouble for some reason
Better documentation for AssembleTiles call.  Made the fixed region a bounding box in all cases.
Fixed error where larger arrays than necessary were allocated for assembling a region.
Version bump to 1.2.0
Merge branch 'Assemble'