(cherry picked from commit d58d2777)

(cherry picked from commit 95eed59f)

(cherry picked from commit 62bc6477)

(cherry picked from commit d87c30dc)

(cherry picked from commit 63d6cc5c)

(cherry picked from commit 7ce11669)

(cherry picked from commit cbdddb47)

sanity fails on Maxwell and CUDA 7.0 due to unknow reason
(cherry picked from commit b4c2891e)

in case if image has odd dimension

(cherry picked from commit 13252133)

(cherry picked from commit fb15bdfb)

(cherry picked from commit 9d2d1734)

(cherry picked from commit 6a6619ec)

added launch bounds attributes for all CUDA kernels
(cherry picked from commit d2251687)

(cherry picked from commit 17608f7a)

uninitialized value
(cherry picked from commit 81ebe28c)

(cherry picked from commit 27302c36)

initialize HOG after CUDA device switch
(cherry picked from commit c849492d)

If used cl compiler, but generator is not Visual Studio e.g. Ninja,
enable FS option to prevent blocking PDB file in multithreaded build.

(cherry picked from commit 58c91356)

move hog::set_up_constants from constructor to compute method

if user changed CUDA device between constructor and computation,
some variables were uninitialized
(cherry picked from commit 21bbed7b)

previous implementation was not thread/stream safe, since it used constant
memory

new implementation doesn't use any global objects, so it is thread/stream safe
(cherry picked from commit 4f5d30a8)

(cherry picked from commit c147ab1e)

Everything else depends on it, after all.

(cherry picked from commit cf54e3b9)

(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

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

(cherry picked from commit 49fe4969)

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

(cherry picked from commit 77578d41)

Absolute destinations are not necessary, and prevent CPack from working.

(cherry picked from commit 0387f8ad)

(cherry picked from commit a87ccb9a)

(cherry picked from commit e6ac6400)

(cherry picked from commit 7bb8c500)

(cherry picked from commit cf852972)

(cherry picked from commit 9206ec30)

(cherry picked from commit be6b8476)

(cherry picked from commit ddc1b965)

(cherry picked from commit 042ff210)

use ASSERT_FLOAT_EQ to compare float values, it is more robust for
large values
(cherry picked from commit d00f36ec)

... before any exceptions occur.

(cherry picked from commit 08da247a)

(cherry picked from commit eeb99726)