Add !takematrix command

[pacpix]

This command is a simple text command that documents the meanings of the different matrix quadrants

elif message.content.startswith('!takematrix'):
        msg = 'Q1 = Hot and Right, Q2 = Hot and Wrong, Q3 = Cold and Wrong, Q4 = Cold and Right'.format(message)
        yield from channel.send(msg)

[EchoFrost]

Note for repository auditors:
This task was completed in the initial commit of the repository.

Ref. commit hash: aa862598739b9c4a9f6d34880fb363f2ec17c30f

[pacpix]

used as a test case due to the relative command architecture simplicity