renamed gpu namespace -> cuda
renamed gpu sanity data to cuda
replaced GPU with CUDA
Added the sanity check result of perf_ml.cpp
Merge branch 'gpu-cuda-rename'
Added sanity check of moments.
Merge pull request #72 from melody-rain:2_4_knearest_neighbor
Merge pull request #74 from melody-rain:2.4_moments_ocl
Added HDR test data
Merge pull request #73 from f-morozov:for_pr
updated sanity data for ocl::norm
Merge remote-tracking branch 'origin/2.4'
Merge pull request #79 from ilya-lavrenov:ocl_perf_norm
added dummy sanity data for ocl::HoughCircles
Merge pull request #80 from ilya-lavrenov:ocl_hough_circles
Merge branch '2.4'

Conflicts:
	testdata/perf/ocl.xml
added sanity data for abs, min, max
Merge pull request #83 from ilya-lavrenov:ocl_perf
sanity data for distanceToCenters test
Merge remote-tracking branch 'origin/2.4'