Pytorch layers: switch to single-precision

Switch to single-precision to match tensorflow implementation and reduce memory requirements.

Basic pytorch layer support

Added basic support and documentation for pytorch layers (neurophox.torch)

Add parallel nullification, butterfly mesh

v0.1.0-alpha.2

small update for README.md

Neurophox initial pre-release

Patched issues with setup.py and pip subpackages.

Neurophox initial pre-release

v0.1.0-alpha

adding new docs badge