FATfs for STM32

I ported the FATfs to a CW project on a STM3210E-EVAL bd.  The interface is SDIO.  The real-time clock stuff is untested, but we will be implementing a full clock-calender and I will post again then.  The project is attached.  The main code formats the card then creates and writes a file.  Also displays some card info.  If you do not comment out the format code block your card will get formatted.