Version 1: First E2E Version of the System (DO NOT MERGE)

[JVerwolf]

This is the first end-to-end version of the system.

This branch contains:

• A CLI for interacting with the system

  cd bin/
  python3 cli.py
  

  Example interaction:

  play justin beiber
  >>>Entity:	justin beiber
  >>>Command:	control_play
  >>>Result: Not implemented
  

• A basic NLP Layer that uses regexes to parse an input string for keywords that signify the user's intention.
• A simple Knowledge Base stored in a relational DB.
• A Play Controller that coordinates the interaction of the various layers of the system.

[okjuan]

I think we could close this soon, since our master branch will have all this functionality. I'll replicate the guide in this PR's description into our repo README as part of #14