* Move pn532 -> pn532_spi
Add pn532_i2c
* Update i2c address
* Always wait for ready byte before reading
* Generalise the pn532 a bit more so less code in i2c and spi implementations
* clang
* Add pn532_i2c to test1
* Try to get setup working
* Fixes
* More updates
* Command consts
* A few upgrades
* Change text back to include 'new'
* Fix data reading