Add rewind and fast forward to media controls in USBHIDConsumerControl.h

[jmcdeg]

I created a wireless windows media controller on a S2 mini. All works well to play/pause music, and to skip tracks etc. It took me a while though to find the codes for rewind and fast forward, which I like to share. I suggest to add CONSUMER_CONTROL_REWIND (0x00B4) and CONSUMER_CONTROL_FAST_FORWARD (0x00B3) to USBHIDConsumerControl.h.