Fix the bug 3440.
added performance tests for NLMeans
added 3-channel support to arithmetic operations
3-channel support in OpenCL kernels for setTo, resize, warpAffine and warpPerspective
Some tests for UMat
update
fixed OpenCL kernel flag in resize (thanks to Ilya L)
Use CMAKE_CFG_INTDIR meta-variable to get the library output directory of the opencv_matlab.
Merge pull request #2062 from cook:bug3440
Merge pull request #1735 from KonstantinMatskevich:umat_tests
Merge pull request #2315 from ilya-lavrenov:nlmeans_perf
Deleted an assignment to a variable that doesn't exist.
Merge pull request #2326 from vpisarev:ocl_ch3
Merge pull request #2336 from SpecLad:useOclChanged