Server Send
---------------
COMMAND: CLEARUSERS	- Signal the client that a new list of users
			  is coming. (See COMMAND: USER:)
COMMAND: RMUSER: {user}	- Specify one user has been removed from the
			  clients vector.
COMMAND: USER: {user}	- Specify one user will be added to the
			  clients vector.
MESSAGE: {user}: {text} - The message received modified to add the
			  user who sent it.

Server Receive
---------------
COMMAND: SENDUSERS	- Process a user list refresh.
MESSAGE: {text}		- The message to be sent to all.
MESSAGETO: {user}: {text} - The message to be sent to a particular
			  person.

Client Send
---------------
COMMAND: SENDUSERS	- Request the list of users.
MESSAGE: {text}		- The message to be sent to all.
MESSAGETO: {user}: {text} - The message to be sent to a particular
			  person.

Client Receive
---------------
COMMAND: CLEARUSERS	- Nuke the list of users in anticipation of
			  receiving a new list. (See COMMAND: USER:)
COMMAND: RMUSER: {user}	- Delete the specified person from the user list.
COMMAND: USER: {user}	- One of the users attached to the server.
			  This will most likely be followed by
			  additional USER: lines so treat each as an
			  addition to the list.
MESSAGE: {text}		- Broadcast message sent by another user.
MESSAGETO: {text}	- Directed message sent by another user.