Add reified method for addHandler.

Author: LossyDragon

src/main/java/in/dragonbra/javasteam/steam/steamclient/SteamClient.kt

@@ -109,6 +109,16 @@ class SteamClient @JvmOverloads constructor(
         addHandlerCore(handler)
     }
 
+    /**
+     * Kotlin Helper:
+     * Adds a new handler to the internal list of message handlers.
+     * @param T The handler to add.
+     */
+    inline fun <reified T : ClientMsgHandler> addHandler() {
+        val handler = T::class.java.getDeclaredConstructor().newInstance()
+        addHandler(handler)
+    }
+
     private fun addHandlerCore(handler: ClientMsgHandler) {
         handler.setup(this)
         handlers[handler.javaClass] = handler