Provide pip package

[quasipedia]

Hello there!

I'd love to use this, but currently the lack of a proper pip installation package makes this very cumbersome: cloning the git repo has a couple of drawbacks that are a show-stopper:

1. One cannot freeze dependencies. If I base a model on the current version of cq_style and then something in cq_style API changes in the future, my model would stop working. Moreover, if that would happen, I wouldn't be able to easily know what previous commit in the git repo worked .
2. Relative paths only work if the interpreter runs the file from disk. In the current version of CQ_editor this does not seem to be the case, so the expression "../cq_style" does not resolve correctly, nor the __file__ variable is set.

Is there a reason I'm failing to see why you chose not to make a pip package available for this?