Initial split of the modules

NadekoBot.Core/Common/Attributes/Usage.cs

@@ -0,0 +1,24 @@
+using System.Runtime.CompilerServices;
+using Discord.Commands;
+using NadekoBot.Services.Impl;
+using System.Linq;
+using Discord;
+
+namespace NadekoBot.Common.Attributes
+{
+    public class Usage : RemarksAttribute
+    {
+        public Usage([CallerMemberName] string memberName="") : base(Usage.GetUsage(memberName))
+        {
+
+        }
+
+        public static string GetUsage(string memberName)
+        {
+            var usage = Localization.LoadCommand(memberName.ToLowerInvariant()).Usage;
+            return string.Join(" or ", usage
+                .Select(x => Format.Code(x)));
+
+        }
+    }
+}