Updated README.rst for KB, 6 zencatalogscan defect fixes
Updated README.rst from Rob Lewis' feedback
Updated README.rst from Rob Lewis' 2nd round of feedback
Updated README.rst from Rob Lewis' 3rd round of feedback
Finished changing variable naming scheme to a_b from aB
Merge pull request #20 from burbel/master

Zencatalogscan fixes and updates to include KB references