https://web.archive.org/web/20130620145414/http://www.neuroforge.co.uk/index.php/getting-started-with-python-a-opencv
https://web.archive.org/web/20130708135521/http://opencv.willowgarage.com/wiki/InstallGuide/
http://trevorappleton.blogspot.com.br/2013/11/python-getting-started-with-opencv.html
http://milq.github.io/install-opencv-ubuntu-debian/
https://www.raspberrypi.org/magpi-issues/MagPi28.pdf