Added simple python code generator.

.py source code generator for the vehicle interface firmware.

-This is just a simple proof of concept implementation.
-currently just creates appropriate data structures so CAN translation
can be done via python
-rather than leveraging existing python classes for json parsing and
codifying their memory state after the parse,
we are creating simple arrays of dicts to loosely match the C structs.
This gives the most flexibility
with small Python interpreters.

-supports a single message set, needs fixed
-does not implement decode or filter, commands and handlers, these are
the responsibility of the consumer of the module