Switch back to CUBIC filter with .5 blur, because images were too blured
Explode Entropy function in two functions to avoid top-bottom and left-right redundancy
Add a "getSafeZoneList" method (used in head detection)
Add head detection.
The PHP Facedetect Extension (with OpenCV) has to be installed first.
Merge branch 'head-detection'
bugfix + doc
Merge branch 'head-detection'