Reduced command module lifetime to a single command execution. Removed ModuleAttribute.

src/Discord.Net.Commands/ModuleBase.cs

@@ -0,0 +1,15 @@
+using System.Threading.Tasks;
+
+namespace Discord.Commands
+{
+    public abstract class ModuleBase
+    {
+        public IDiscordClient Client { get; internal set; }
+        public CommandContext Context { get; internal set; }
+
+        protected virtual async Task ReplyAsync(string message, bool isTTS = false, RequestOptions options = null)
+        {
+            await Context.Channel.SendMessageAsync(message, isTTS, options).ConfigureAwait(false);
+        }
+    }
+}