Commits:
- 09837928
- 10fb88d0

Excluded changes with std::atomic (C++98 requirement)

  * Stop calling nppSetStream

- removed tr1 usage (dropped in C++17)
- moved includes of vector/map/iostream/limits into ts.hpp
- require opencv_test + anonymous namespace (added compile check)
- fixed norm() usage (must be from cvtest::norm for checks) and other conflict functions
- added missing license headers

Restore "DstType" in AbsDiffScalarOp template arguments, even if
eventually it will be equal to SrcType

use "double" from scalar only for CV_64F input

simplify code by requesting srcDepth == dstDepth

I took the subScalar.cu code and changed the inner operation

  * modify test, too

* MulSpectrums
* StereoConstantSpaceBP
* BruteForceNonLocalMeans

to import existed CUDA stream or CUDA event to OpenCV

Conflicts:
	modules/gpu/doc/per_element_operations.rst

- Substituted HAVE_WINRT with WINRT
- Fixed compilation issues in ocl.cpp and parallel.cpp
- Fixed compiler issue for WP8: "C2678: binary '+' : no operator found which takes a left-hand - Fixed gitignore
- Added #ifdef HAVE_OPENCL to remove compiler warnings in ocl.cpp
- Used NO_GETENV similar to '3rdparty\libjpeg\jmemmgr.c;
- Added ole32.lib for core module (for WindowsStore 8.0 builds)
- Made OpenCV_ARCH aware of ARM
Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

rename cv::cuda::internal namespace
to cv::cuda::device to prevent conflicts
with cv::internal

* remove overloads with explicit buffer, now BufferPool is used
* added async versions for all reduce functions