Updated to MonoGame 3.6 + Directory refactor

- Barotrauma's projects are in the Barotrauma directory
- All libraries are in the Libraries directory
- MonoGame is now managed by NuGet, rather than referenced from the installed files (TODO: consider using PCL for easier cross-platform development?)
- NuGet libraries are not included in the repo, as getting the latest versions automatically should be preferred
- Removed Content/effects.mgfx as it didn't seem to be used anywhere
- Removed some references to Subsurface directory
- Renamed Launcher2 to Launcher

Libraries/Lidgren.Network/NetServer.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Collections.Generic;
+
+namespace Lidgren.Network
+{
+	/// <summary>
+	/// Specialized version of NetPeer used for "server" peers
+	/// </summary>
+	public class NetServer : NetPeer
+	{
+		/// <summary>
+		/// NetServer constructor
+		/// </summary>
+		public NetServer(NetPeerConfiguration config)
+			: base(config)
+		{
+			config.AcceptIncomingConnections = true;
+		}
+
+		/// <summary>
+		/// Send a message to all connections
+		/// </summary>
+		/// <param name="msg">The message to send</param>
+		/// <param name="method">How to deliver the message</param>
+		public void SendToAll(NetOutgoingMessage msg, NetDeliveryMethod method)
+		{
+			var all = this.Connections;
+			if (all.Count <= 0)
+				return;
+
+			SendMessage(msg, all, method, 0);
+		}
+
+		/// <summary>
+		/// Send a message to all connections except one
+		/// </summary>
+		/// <param name="msg">The message to send</param>
+		/// <param name="method">How to deliver the message</param>
+		/// <param name="except">Don't send to this particular connection</param>
+		/// <param name="sequenceChannel">Which sequence channel to use for the message</param>
+		public void SendToAll(NetOutgoingMessage msg, NetConnection except, NetDeliveryMethod method, int sequenceChannel)
+		{
+			var all = this.Connections;
+			if (all.Count <= 0)
+				return;
+
+			if (except == null)
+			{
+				SendMessage(msg, all, method, sequenceChannel);
+				return;
+			}
+
+			List<NetConnection> recipients = new List<NetConnection>(all.Count - 1);
+			foreach (var conn in all)
+				if (conn != except)
+					recipients.Add(conn);
+
+			if (recipients.Count > 0)
+				SendMessage(msg, recipients, method, sequenceChannel);
+		}
+
+		/// <summary>
+		/// Returns a string that represents this object
+		/// </summary>
+		public override string ToString()
+		{
+			return "[NetServer " + ConnectionsCount + " connections]";
+		}
+	}
+}