API cleanup, prepare for CustomEvent, fix server not shutting down

RageCoop.Client/Scripting/ClientScript.cs

@@ -1,17 +1,23 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace RageCoop.Client.Scripting
+namespace RageCoop.Client.Scripting
 {
     /// <summary>
-    /// Inherit from this class, constructor will be called when the script is loaded.
+    /// Inherit from this class, constructor will be called automatically, but other scripts might have yet been loaded, you should use <see cref="OnStart"/>. to initiate your script.
     /// </summary>
     public abstract class ClientScript:Core.Scripting.IScriptable
     {
+        /// <summary>
+        /// This method would be called from main thread shortly after all scripts have been loaded.
+        /// </summary>
         public abstract void OnStart();
+
+        /// <summary>
+        /// This method would be called from main thread when the client disconnected from the server, you MUST terminate all background jobs/threads in this method.
+        /// </summary>
         public abstract void OnStop();
+
+        /// <summary>
+        /// Get the resource directory this script belongs to, beware that this directory should not be used to store any client-specific information since it'll get deleted every time the resource is loaded.
+        /// </summary>
+        public string CurrentDirectory { get;internal set; }
     }
 }