Added threaded server awaiting incoming connections.

Added CHCServer.py - the server that will be listening for and handling
messages sent from the client.
Added ServerConnectTests.py - unit test for the server class. Currently
you need to run the server before running the unit tests.
Added chc_code\ - this folder will contain the our "code" which we will
be using to encode and decode messages that are sent to the server in
preparation for storage in the database and sending to the recipient.