Revamp Docs and README

[ethan-shanahan]

The documentation and README needs a revamp.
Additionally, contributing info should be moved to its own dedicated file.

[ethan-shanahan]

PR #49 begins to address this issue. The README is improved.

[ethan-shanahan]

PR #53 should make writing the docs much easier now!

[ethan-shanahan]

PR #56 intends to improve the documentation. Some small steps have been taken already.