tyst3273/pynamic-structure-factor: first release!

this is the first release. yay! the code is ready to use for production calculations, but there is no documentation on how to use it and no examples. actually, the input variables are documented in ./psf/defaults.py but these were mainly for my own benefit and may not be perfect for a new user to learn how to use the code. contact me if you really want to use my code and I will try to help.

Full Changelog: https://github.com/tyst3273/pynamic-structure-factor/commits/v1.1.0