Custom for Bally game show pinball. Boards and wiring done by me! Some details at http://www.peterhofmann.biz/
To install wiring pi:
git clone git://git.drogon.net/wiringPi
cd wiringPi
sudo ./build
Includes Mongoose web server
https://github.com/cesanta/mongoose/
Includes rapidjson
https://github.com/miloyip/rapidjson
Includes a cross compilation script too!
http://hertaville.com/development-environment-raspberry-pi-cross-compiler.html
TODO:
GI