WIP: Add script to automate preparations for import

Add a python file that will run the packing steps to prepare the
VistA-FOIA repository contents for import into an instance.

Update the documentation to instruct the user to utilize this new script.

Update the ImportRG.cmake.in file to use the new script.

OSEHRA-Id: http://issues.osehra.org/browse/OAT-65
Change-Id: Iaad7ae587dc8eca122415d273aaed75ecba41e06