Merge branch 'master' into gpu-cuda-rename

Conflicts:
	modules/core/include/opencv2/core/cuda.hpp
	modules/cudacodec/src/thread.cpp
	modules/cudacodec/src/thread.hpp
	modules/superres/perf/perf_superres.cpp
	modules/superres/src/btv_l1_cuda.cpp
	modules/superres/src/optical_flow.cpp
	modules/videostab/src/global_motion.cpp
	modules/videostab/src/inpainting.cpp
	samples/cpp/stitching_detailed.cpp
	samples/cpp/videostab.cpp
	samples/gpu/stereo_multi.cpp

modules/cudaimgproc/src/histogram.cpp

@@ -257,7 +257,7 @@ namespace
 
 cv::Ptr<cv::cuda::CLAHE> cv::cuda::createCLAHE(double clipLimit, cv::Size tileGridSize)
 {
-    return new CLAHE_Impl(clipLimit, tileGridSize.width, tileGridSize.height);
+    return makePtr<CLAHE_Impl>(clipLimit, tileGridSize.width, tileGridSize.height);
 }
 
 ////////////////////////////////////////////////////////////////////////