- Database namespace is now NadekoBot.Db

- Db related code is now in src/NadekoBot/Db
- Finished major part of the db refactor, but many optimizations are left to be made

src/NadekoBot/Db/Models/UserXpStats.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace NadekoBot.Core.Services.Database.Models
+{
+    public class UserXpStats : DbEntity
+    {
+        public ulong UserId { get; set; }
+        public ulong GuildId { get; set; }
+        public int Xp { get; set; }
+        public int AwardedXp { get; set; }
+        public XpNotificationLocation NotifyOnLevelUp { get; set; }
+        public DateTime LastLevelUp { get; set; } = DateTime.UtcNow;
+    }
+
+    public enum XpNotificationLocation { None, Dm, Channel }
+}