Pycatia

* There have been a lot of changes at this revision. If you are upgrading from a previous revision the changes will
break your existing scripts (sorry!). They will be mostly simply fixes to import statements. See the updated examples
for ideas on how you should correct them.

These changes were made to allow for the future expansion of pycatia by having a more modular approach (hopefully).
* module re-organisation.
* updated get_hybrid_by_name to now raise a meaningful exception if the user has input a name that doesn't exist.
* many updates to the Product class properties and methods. One of the more useful is probably Product.apply_work_mode()
. See example_4.py for example.
* can now analyse (analyze) products for mass, volume, wet area, center of gravity and inertia. See example_10.py
* enabled Product.move() method. See example_11.py

* updated pywin32 requirement so pycatia can work with later versions of python.

* Added feature to get position matrix of product. See new example 9.

* Attempt to fix pip installation error.

* Added unit requirement to create_points function. Previously it was assumed all inputs were millimeters.
* Added missing macros file to pypi package.

* Added CATDrawing methods