New small module to deal with loading TAZ info from files :- either Shapefile,
or CSV.
Ignores.
Added new otp_batch.py high-level processing script for OTP batch runs of O-D
matrix calculation.

Re-factored a lot of the underlying scripts to be able to be more configurable
instead of hard-coded to the conventions of particular files from my first
example runs.
Refactoring several files, as per last commit.
Remove unneeded comment.