Started working on KeyboardBase api docs

source/Cosmos.HAL2/KeyboardBase.cs

@@ -7,11 +7,17 @@
         /// </summary>
         public abstract void Initialize();
 
+        /// <summary>
+        /// Update keyboard LEDs.
+        /// </summary>
         public abstract void UpdateLeds();
 
         public delegate void KeyPressedEventHandler(byte ScanCode, bool Released);
         public KeyPressedEventHandler OnKeyPressed;
 
+        /// <summary>
+        /// Wait for key to be pressed.
+        /// </summary>
         public static void WaitForKey()
         {
             Core.Global.CPU.Halt();