format
add llcp layer(not finished)
able to get a message from galaxy nexus(android 4.3)
Add HSU driver.
Modify examples to support HSU driver. Adjust debug message.
add snep layer, use example snep_test to exchange data with galaxy nexus(android 4.3)
update README.md
Update HSU(High Speed Uart) driver to adapt new PN532 interface.
Merge seeed master branch, update HSU driver.
Merge branch 'PN532_HSU' of github.com:elechouse/PN532 into PN532_HSU