in a compile time error rather than a confusing runtime error.

object_detector.

define a custom version of HOG feature extraction.

isn't being computed correctly" debugging check inside the structural SVM
solver.

Previously, the elements of the vector were returned by reference which is
problematic for std::vector<bool>

in color instead of always converting to grayscale.

on windows.

building dlib as a shared library.

build to use fftw.