Added a cat_3_calculator script and some necessary changes to make it work
This script takes a --zipfile option on the commandline, with the path to a zip of QRDA Category I files to be tested
It also takes multiple --measure options, each of which is followed by an HQMF ID to test and export in the QRDA Category III
The QRDA Category III is printed to stdout, while all other output is suppressed
Updated measure_evaluation_validator code, including some additions to the rakefile to allow for JS updating for testing