Update Documentation to be compatible with Beta2

this one took a while

docs/guides/samples/dependency_map_setup.cs

@@ -1,6 +1,7 @@
 using Discord;
 using Discord.Commands;
 using Discord.WebSocket;
+using foxboat.Services;
 
 public class Commands
 {
@@ -8,10 +9,16 @@ public class Commands
     {
         var commands = new CommandService();
         var map = new DependencyMap();
-        map.Add<IDiscordClient>(client);
-        var self = await client.GetCurrentUserAsync();
-        map.Add<ISelfUser>(self);
+        map.Add(client);
+        map.Add(commands);
         await commands.LoadAssembly(Assembly.GetCurrentAssembly(), map);
     }
+    // In ConfigureServices, we will inject the Dependency Map with 
+    // all of the services our client will use.
+    public Task ConfigureServices(IDependencyMap map)
+    {
+        map.Add(new NotificationService(map));
+        map.Add(new DatabaseService(map));
+    }
     // ...
 }