- now have a AES128, SHA1 and CRC implementation
- now crc check the boot section chunks as well as the instruction headers
- now sha1 check the sb header and the whole file
- nearly all fields of the sb format are now documented
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28708 a1c6a512-1295-4272-9138-f99709370657
