Added Hook for player login, for plugin sake, now they can utilize the login before join.

TShockAPI/Hooks/PlayerLoginEvent.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace TShockAPI.Hooks
+{
+    class PlayerLoginEventArgs
+    {
+        public TSPlayer Player { get; set; }
+        public PlayerLoginEventArgs(TSPlayer ply)
+        {
+            Player = ply;
+        }
+    }
+
+    class PlayerLoginEvent
+    {
+        public delegate void PlayerLoginD(PlayerLoginEventArgs e);
+        public static event PlayerLoginD PlayerLogin;
+        public static void OnPlayerLogin(TSPlayer ply)
+        {
+            if(PlayerLogin == null)
+            {
+                return;
+            }
+
+            PlayerLoginEventArgs args = new PlayerLoginEventArgs(ply);
+            PlayerLogin(args);
+        }
+    }
+}