Merge pull request #16 from jim17/nessieTest

AES bug fix and code clean
update atmel studio solution, compiles!
cleaning directories and code
update doxygen doc
Update SPI library functions to camel case and add Usart
Merge pull request #17 from harlequin-tech/master

Update SPI library functions to camel case and add Usart
solved some warnings on doxygen documentation
Merge branch 'master' of https://github.com/limpkin/mooltipass into nessieTest