Added addons, ofxCv2 by alvarohub and ofxLibdc by kylemcdonald
Replaced ofxCv2 with ofxCv by kylemcdonald
Deleted checking raw1394 dependency
* added correct cmake version numbering
* reset earlier cmake build changes since they were correct
Merge pull request #1 from micuat/ofxCvAndOfxLibdc

Added addons, ofxCv2 by alvarohub and ofxLibdc by kylemcdonald
* added cairo, png and pixman to contributed libs to avoid problems with other
  versions on OSX
* restrict cairo build to OSX only
* remove PNG from OpenCV
* added PointCloudLibrary (PCL) to build