Initial split of the modules

NadekoBot.Core/Common/ModuleBehaviors/IEarlyBlocker.cs

@@ -0,0 +1,13 @@
+using System.Threading.Tasks;
+using Discord;
+
+namespace NadekoBot.Common.ModuleBehaviors
+{
+    /// <summary>
+    /// Implemented by modules which block execution before anything is executed
+    /// </summary>
+    public interface IEarlyBlocker
+    {
+        Task<bool> TryBlockEarly(IGuild guild, IUserMessage msg);
+    }
+}