Copy SHA204SWI filed to TWI.
Add TWI_hardware_cfg.
More work on sha204/twi (wip).
Merge branch 'master' into i2c
A bit more on sha204/twi (wip).
Implement i2c reset.
SHA204/TWI code fixes. Compiles now.
ATSHA over I2C works.
Update main fw sources for I2C.
First SHA command library code.
playground now supports sha command.
Port sha code from avr/playground to arduino/playground.
Fix _playground + SHA command.
talk_to_sha: SHA support.
Update README.