USB device stack

Dependents:   mbed-mX-USB-TEST1 USBMSD_SD_HID_HelloWorld HidTest MIDI_usb_bridge ... more

This pull request has been accepted and merged in by Anna Bridge

Added support for the logo key to the keyboard

Very minor change - I expanded the list of key modifiers to include the logo/GUI/windows key. I also added the options to specify the right hand versions of the keys rather than just the left if for some reason someone wants to do this.

Changes are limited to the keyboard header file and are backwards compatible.

The new modifier values are in line with the table given on page 56 of this document http://www.usb.org/developers/hidpage/HID1_11.pdf

USB device stack - Added support for the logo/windows key to USB keyboard. device, USB