Discord Bot

This release adds the long anticipated Discord bot!
Commands are handled in the simplest way possible, the same way chat messages are,
Slash commands would introduce a lot of boilerplate for each command, inflating the code base size exponentially.

With this change, you must provide your Minecraft username as the first argument to any commands used in Discord,
Which each command can choose to use as the sender or input argument depending on the command source.

Command responses are also changed depending on the incoming command source (Ex in-game whisper or Discord message)

Full Changelog: 0.3.3...0.4.0