[server] Send client colours in state updates

Nibriboard/Client/NibriClient.cs

@@ -161,6 +161,7 @@ namespace Nibriboard.Client
 			ClientState result = new ClientState();
 			result.Id = Id;
 			result.Name = Name;
+			result.Colour = Colour;
 			result.AbsCursorPosition = AbsoluteCursorPosition;
 			result.Viewport = CurrentViewPort;
 

Nibriboard/RippleSpace/ClientState.cs

@@ -24,6 +24,11 @@ namespace RippleSpace
 		/// </summary>
 		public string Name;
 
+		/// <summary>
+		/// The colour associated with the client.
+		/// </summary>
+		public ColourHSL Colour;
+
 		/// <summary>
 		/// The size and position of the client's viewport.
 		/// </summary>