Minor cleanup of the Mass Storage bootloader VirtualFAT code.

git-svn-id: http://lufa-lib.googlecode.com/svn@2672 d5102386-fcda-11dd-9fdb-3debd5008f28
Clean up the VirtualFAT implementation.

git-svn-id: http://lufa-lib.googlecode.com/svn@2673 d5102386-fcda-11dd-9fdb-3debd5008f28
Add EEPROM read/write support to the Mass Storage class bootloader.

git-svn-id: http://lufa-lib.googlecode.com/svn@2674 d5102386-fcda-11dd-9fdb-3debd5008f28