Added support for 3-channels
fixed cv::warpPerspective
Don't build CUDA modules stubs by default (use `-DBUILD_CUDA_STUBS=ON` if need them)
invoking OCL before IPP
Remove pre_invalid parameter
Merge pull request #2855 from ilya-lavrenov:tapi_warpp_fix
Merge pull request #2865 from ilya-lavrenov:morph
Join kernel code for int and float destination types
fixed usage of reshape
Small refactoring
Fix pointer conversion
Merge pull request #2849 from ElenaGvozdeva:ocl_matchTemplate_3cn
Merge pull request #2854 from ilya-lavrenov:tapi_filter2d
Merge pull request #2871 from vbystricky:oclopt_integral
Merge pull request #2863 from apavlenko:disable_cuda_stubs_defaults