Simple Raspberry Pi MMAL project

0. Install pre-required packages

   $ sudo apt-get install cmake libopencv-dev

1. Place Raspberry Pi userland project in /home/pi/src/raspberrypi/userland

   $ mkdir -p /home/pi/src/raspberrypi

   $ cd /home/pi/src/raspberrypi

   $ git clone --depth 1 https://github.com/raspberrypi/userland.git

2. Build pre-required libraries

   $ make -C /opt/vc/src/hello_pi/libs/vgfont

3. Build project

   $ mkdir build

   $ cd build

   $ cmake ../

   $ make