Also made the bracketing phase more efficient.

amount of time.

--HG--
rename : examples/dnn_mit67_ex.cpp => examples/dnn_mnist_resnet_ex.cpp

immediately after the input layer.

introduce a configurable threshold for rendering HOGs

how much the current step size has converged.

call_matlab.h into dlib namespace, and also added missing overloads for
call_matlab().

MATLAB mex file.

Fixed a minor typo in the spec.