Removed file_context, name_context, name_schema, and ranks modules
(Moved into KitCAT Project).
Wrote much simpler abx_context to replace essential features for ABX.
Initial commit of ABX development sources. The abx package itself is in the abx folder. The MakeAddOnZip.py script creates the archive to install into Blender in the pkg folder. The tests folder contains unit tests which require the contents of testdata as fixtures.
