REG_NONE defined in ml.hpp conflicts with defined in Winnt.h

Incorrect number of input arguments in main function

Previously the Python3 cv2 package ends up with no submodules (bgsegm, face,
etc) in it, which makes a lot of functionality unusable. By not writing over
our root reference we ensure the new submodules are added to the correct cv2
module.

Updates README to reflect setup_script build capabilities and requirements to setup binaries and includes for sample applications. Fixes #24

Everything else depends on it, after all.

(cherry picked from commit cf54e3b9)

Conflicts:
	cmake/OpenCVPackaging.cmake

(cherry picked from commit 6d52ea89)

Which also happens to align the non-Debian specific variables
with the ones used by upstream CMake.

(cherry picked from commit b8c60234)

Conflicts:
	cmake/OpenCVPackaging.cmake

It's pretty much a simplified copy of the Linux script, lacking fancy colors.
Also, I had to drop Python testing, because it's not easy to pass the Python
module location to the script, and I have no pressing need to run the Python
tests at the moment.

(cherry picked from commit c1e3ca17)

Conflicts:
	CMakeLists.txt

Because why not?

(cherry picked from commit e8a73940)

Conflicts:
	data/CMakeLists.txt

They don't actually do anything. And even if they did, all components are
enabled by default, anyway.

(cherry picked from commit 49fe4969)

Conflicts:
	cmake/OpenCVPackaging.cmake

FFmpeg now requires that frames allocated with avcodec_alloc_frame are
freed with avcodec_free_frame.

(cherry picked from commit 77578d41)

Conflicts:
	modules/highgui/src/cap_ffmpeg_impl.hpp

The HAVE_DOC_GENERATOR variable was always true.

(cherry picked from commit 3d46c1f9)

Conflicts:
	doc/CMakeLists.txt

... before any exceptions occur.

(cherry picked from commit 08da247a)

(cherry picked from commit 16ce114e)

    modules/videoio/src/cap_gstreamer.cpp:577:31: error: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wreserved-user-defined-literal]
            filename = "v4lsrc ! "COLOR_ELEM" ! appsink";
                              ^
    modules/videoio/src/cap_gstreamer.cpp:585:32: error: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wreserved-user-defined-literal]
            filename = "v4l2src ! "COLOR_ELEM" ! appsink";

looks like Maksim was right; the new fix does not do the second attempt to detect python libs, it finds it correctly with the first attempt