* can be enabled by defining Makefile macro SERIAL_MOUSE_MICROSOFT_ENABLE or
   SERIAL_MOUSE_MOUSESYSTEMS_ENABLE.
 * Serial implementation can be chosen via SERIAL_MOUSE_USE_SOFT and
   SERIAL_MOUSE_USE_UART macros
 * UART configuration still has to be done in config.h: I added working clauses
   for both mouse protocols to ps2_usb's config.h

- Command can force to enable NKRO even when boot mode
- After boot keyboard may be in boot mode due to BIOS' request

- NKRO is used only when keyboard_protocol = 1(report)

- Blocking occurs if built without option INTERRUPT_CONTROL_ENDPOINT

- Add print messages of USB intialize procesure.
- call out sei() in earlier stage. LUFA API doc of USB_Init() says:
interrupts must be enabled within 500ms ... to ensure that the host does
not time out whilst enumerating the device
- remove matrix_init() from suspend_wakeup_init(). It is not needed in
  fact and if matrix_init() takes long time to initialize it prevents
host emnumerating the device.

This fixes problem that it losts keycode when send keycodes in row in layer.c.
Undef CONSOLE_ENABLE build option makes this problem clear.

- worked on Linux but not on Windows
  (logica/usage MINIMUM must start at 0x001)