* Changing namespace back to "libfacerec", in order to avoid namespace collisions with OpenCV.
* Adding suggested algorithms and changes by berak:
    * Adding a class for building spatial histograms easier
    * Adding WLD (Webers Law Descriptor) as a new descriptor
* Changing namespace back to "libfacerec", in order to avoid namespace collisions with OpenCV.
* Adding suggested algorithms and changes by berak:
    * Adding a class for building spatial histograms easier
    * Adding WLD (Webers Law Descriptor) as a new descriptor