Version 1.2 published to PyPI

A big change that was planned for a while.
The package has been ported to a pytorch backend with using code from fcd_torch. Thanks to the authors.
I made these changes as pytorch is more commonly in molecule generation, which saves an additional dependency.
It also allows for a lighter package and faster import times.

v1.1

Merge pull request #9 from bioinf-jku/dev

Update to version 1.1

v1.0.1

Changed version number