Assorted improvements.

- Add UserService.
- Add "setrep" command.
- Rename confusing methods and variables in AbstractAnimationHandler.
- Change Bayan cooldown to Zero.
- Add crappy "cooldowns" command.

Core/Startup.cs

@@ -2,6 +2,7 @@ using BotFramework;
 using Kruzya.TelegramBot.Core.Cache;
 using Kruzya.TelegramBot.Core.Data;
 using Kruzya.TelegramBot.Core.Extensions;
+using Kruzya.TelegramBot.Core.Service;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.EntityFrameworkCore;
@@ -41,6 +42,8 @@ namespace Kruzya.TelegramBot.Core
             // Cache for users.
             services.AddSingleton<ICacheStorage<long, User>, MemoryCache<long, User>>();
 
+            services.AddSingleton<UserService>();
+
             // Trigger module handlers.
             _core.Modules.ConfigureServices(services);
         }