Move netmodule handling into handlers namespace

Add handler for teleport pylons, and permission for teleport pylons

TShockAPI/Handlers/NetModules/INetModuleHandler.cs

@@ -0,0 +1,23 @@
+using System.IO;
+
+namespace TShockAPI.Handlers.NetModules
+{
+	/// <summary>
+	/// Describes a handler for a net module
+	/// </summary>
+	public interface INetModuleHandler
+	{
+		/// <summary>
+		/// Reads the net module's data from the given stream
+		/// </summary>
+		/// <param name="data"></param>
+		void Deserialize(MemoryStream data);
+
+		/// <summary>
+		/// Provides handling for the packet and determines if it should be accepted or rejected
+		/// </summary>
+		/// <param name="player"></param>
+		/// <param name="rejectPacket"></param>
+		void HandlePacket(TSPlayer player, out bool rejectPacket);
+	}
+}