* Added UNO compatibility.
  This version works, but it really crappy. I have now to optimize all the communication.
  From WeIO side, I had to add a sleep before 'n = port_to_try.inWaiting()' to get it
  working. I don't know why...
* Forgot to add Config.mk
* Communication is bettr at 250k bauds instead of 38400 bauds
* Fixed the buffer size defs in the Makefile.
  In previous version, buffers was only 32 bytes
* Cleanup the debug code I previously put in uart.c
* Use uart_init with the baudrate MACRO
* Made the Makefile more generic
* Cosmetics
* Added a Makefile on the root directory