Thanks to Martin Fergie for reporting this problem.

Ping-Chang Shih.  The function ignored the max_iter parameter.

didn't work on non-double valued matrices.

failure in the makedocs script

detector since it is much more user friendly.

vector represented using a matrix.

begin() and end() methods.

point behavior on different compilers.  In particular, this change avoids having
false "impossible truth box" exceptions being thrown when the object detection
tools are used with the mingw gcc compiler.