Urban Dictionary command, small improvents in message handler, emojis are in embeds now, avatar command

Geekbot.net/Commands/AvatarGetter.cs

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+using System;
+using System.Threading.Tasks;
+using Discord;
+using Discord.Commands;
+using Geekbot.net.Lib;
+
+namespace Geekbot.net.Commands
+{
+    public class AvatarGetter : ModuleBase
+    {
+        private readonly IErrorHandler _errorHandler;
+        
+        public AvatarGetter(IErrorHandler errorHandler)
+        {
+            _errorHandler = errorHandler;
+        }
+
+        [Command("avatar", RunMode = RunMode.Async)]
+        [Remarks(CommandCategories.Randomness)]
+        [Summary("Get someones avatar")]
+        public async Task getAvatar([Remainder, Summary("user")] IUser user = null)
+        {
+            try
+            {
+                if (user == null)
+                {
+                    user = Context.User;
+                }
+                await ReplyAsync(user.GetAvatarUrl());
+            }
+            catch (Exception e)
+            {
+                _errorHandler.HandleCommandException(e, Context);
+            }
+        }
+    }
+}