Interaction:
	Client connects to server

start:
	Client sends log in message
		If they send something else, they should receive an error
	If there is a name conflict:
		The server will send an error, and we return to the start
	If not:
		The server will send an accept message
	The server will send a list of logged-in users

While the client is logged in:
	If the client sends a broadcast message:
		The server relays it to all users
	If the client sends a specific message:
		The server relays it to the specific user
		If there is no such user, it returns an error
		If the user is logged in, it returns a success message
	If the client sends a log in message:
		Same as the start
	If a new client logs in:
		Server will send a new user message

When the client disconnects:
	The server sends a message that they disconnected

Messages in this protocol:
	Login
	Error
	New User
	Accept Login
	Accept Specific Message
	Broadcast Message
	Specific Message
	User Disconnected
	New Broadcast Message
	
Login:
	(1)  Type:  1
	(32) Username:  ASCII string

Error:
	(1)   Type:  2
	(2)	Error Message Length:  16-bit unsigned integer
	(?)   Actual error message:  ASCII string

New User:
	(1)   Type:  3
	(32)  Username:  ASCII string

Accept Login:
	(1)   Type:  4

Accept Specific Message:
	(1)   Type:  5

Broadcast Message:
	(1)   Type:  6
	(2)   Message Length:  unsigned 16-bit integer
	(?)   Actual Message:  ASCII string

Specific Message:
	(1)   Type:  7
	(32)  Username:  ASCII string
	(2)   Message Length:  unsigned 16-bit integer
	(?)   Message

User Disconnected:
	(1)   Type:  8
	(32)  Username:  ASCII string

New Broadcast Message:
	(1)   Type:  9
	(32)  Message Sender:  ASCII string
	(2)   Message Length:  unsigned 16-bit integer
	(?)   Actual Message:  ASCII string