Adds UserManager to sql

Changes the way Warps and Regions are stored
A few other minor tweaks

TShockAPI/DB/GroupManager.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Data;
+using Community.CsharpSqlite.SQLiteClient;
+
+namespace TShockAPI.DB
+{
+    public class GroupManager
+    {
+        private IDbConnection database;
+
+        public GroupManager(IDbConnection db)
+        {
+            database = db;
+        }
+
+        public bool GroupExists(string group)
+        {
+            return true;
+        }
+    }
+}