Adding support for the Micro Switch 8304 Hall Effect Keyboard

- Full support (NKRO, provided the USB module can handle it)
- Full LED support (available to the macro modules per input signals)
- Reset/Hold line support
- Handles repeat rate issues (keyboard does not send key updates as most
  keyboards do...)

Keymap/keymap.h

@@ -44,6 +44,7 @@
 #include "budkeypad.h"
 #include "heathzenith.h"
 #include "kaypro1.h"
+#include "microswitch8304.h"
 #include "tandy1000.h"