PinServer.ino: Initial version of the sketch; all but blinking and bonjour support
Add Makefile for building using arduino-mk
PinServer.ino: Add support for blinking

For the time being, we do not use timers; that should be necessary only
when dealing with unreliable client communication or when millisecond
precision is required.
Add Bonjour advertising support using the EthernetBonjour library