Das Keyboard 4Q Fix-up

Commits squashed and amended for code style by Adam Honse <calcprogrammer1@gmail.com>

Controllers/DasKeyboardController/DasKeyboardController.h

@@ -27,6 +27,8 @@ public:
 
     std::string GetVersionString();
 
+    std::string GetLayoutString();
+
     void SendColors(unsigned char key_id, unsigned char mode,
                     unsigned char red, unsigned char green, unsigned char blue);