Reset XMEGA NVM read command to the symbolic NO_OPERATION constant rather than a hard-coded zero.

git-svn-id: http://lufa-lib.googlecode.com/svn@2589 d5102386-fcda-11dd-9fdb-3debd5008f28
Update author information.

git-svn-id: http://lufa-lib.googlecode.com/svn@2590 d5102386-fcda-11dd-9fdb-3debd5008f28
Fixed swapped LED3 and LED4 masks for the Olimex-32U4 development board LED driver.

git-svn-id: http://lufa-lib.googlecode.com/svn@2591 d5102386-fcda-11dd-9fdb-3debd5008f28