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