Initial test of Ableton Link on Raspberry pi, lighting LEDs for clock and reset.

This is just a scratched-together example and not intended for distribution. There's no package or dependency management, no submodules, etc so the Pi environment must be configured exactly right for this to build.

1. Make sure you have CMake >3.0 and GCC >5.2 installed as packages.
2. Download and install WiringPi
3. Clone Ableton Link into lib/
   • git clone https://github.com/Ableton/link.git lib/link
4. Run CMake
   • cmake .
5. Build
   • make
6. Run with sudo
   • sudo bin/link_test

The pins used for clock/reset output are defined clearly in main.cpp. Hook up LEDs to those pins (using the wiringPi numbering scheme), connect the Pi to your local network and GO!