Minor documentation improvements.

git-svn-id: http://lufa-lib.googlecode.com/svn@2643 d5102386-fcda-11dd-9fdb-3debd5008f28
Tweak the LUFA config for the Mass Storage class bootloader to reduce the compiled size slightly by removing unused features.

git-svn-id: http://lufa-lib.googlecode.com/svn@2644 d5102386-fcda-11dd-9fdb-3debd5008f28