Broke FatFS functions out into a separate function and header.

Removed auto mount and unmount functionality. Since the EmbestBB doesn't appear to pass the inserted signal to the Discovery board.

TODO: Somehow broke USB-CDC

Updated FatFS to 0.9b with label functions.

Changed default serial port bitrate to 115200.

Enabled USART1 & USART2, Disabled USART6.