cmake: detect Direct 3D 11
core: added DirectX interop implementation (OpenCL) with samples
Added ocl_medianFilter using Transparent API
umat: fix memory leaks
Fixed trailing whitespace
added cv::gemm to T-API
Fixed medianFilter
Fixed condition for channels
minMaxLoc
some fixes
fixed UMat::copyTo(UMat)
Merge pull request #1998 from ilya-lavrenov:tapi_gemm
Merge pull request #1992 from ElenaGvozdeva:ocl_medianFilter
Merge pull request #1969 from KonstantinMatskevich:ocl_tapi_minmaxloc
Merge pull request #1917 from alalek:ocl_d3d
Merge pull request #2004 from ilya-lavrenov:tapi_umat_copyto
Merge pull request #1997 from alalek:tapi_fix_memleaks
adding LICENSE file and a sample of its reference in ocl.hpp
Merge pull request #2000 from apavlenko:license_copyright
Merge remote-tracking branch 'upstream/master'