Change manual packet numbering to a dictionary

MistoxServer/Client/TCPClient.cs

@@ -34,8 +34,8 @@ namespace Mistox.Client {
 
                         // Parse the header
                         DataPacketHeader Header = new DataPacketHeader {
-                          Type = headerBuffer[0],
-                          DataLength = (ushort)((headerBuffer[1] << 8) | headerBuffer[2])
+                          Type = (ushort)((headerBuffer[0] << 8) | headerBuffer[1]),
+                          DataLength = (ushort)((headerBuffer[2] << 8) | headerBuffer[3])
                         };
 
                         // Make sure the data looks valid