Camera functionality stub.
requirements and design: features.
Added remote control mapping for taking picture. Command is "take_pic".
Merge pull request #13 from jesseniemisto/master

requirements and design: features.
Merge branch 'master' of https://github.com/domewolf/raspimobot
take_pic() now takes the picture data array, width and height as parameters.
Merge branch 'master' of https://github.com/domewolf/raspimobot