Conflicts:
	modules/core/include/opencv2/core/operations.hpp
	modules/core/include/opencv2/core/version.hpp
	modules/core/src/gpumat.cpp
	modules/cudaimgproc/src/color.cpp
	modules/features2d/src/orb.cpp
	modules/imgproc/src/samplers.cpp
	modules/ocl/include/opencv2/ocl/matrix_operations.hpp
	modules/ocl/include/opencv2/ocl/ocl.hpp
	samples/ocl/facedetect.cpp

The method ocl::oclMat::ptr() is being removed because it returns a pointer to a row of oclMat::data. The data attribute is a cl_mem structure and cannot be iterated outside an OpenCL kernel.

minor improvements

GStreamer 1.x is universally available, and with 0.10 being deprecated,
there should be no reason to default to 0.10 stil.

The oclMat::ptr() method was mistakenly used in ocl::BruteForceMatcher to pass a pointer to a oclMat object. The ptr() method returns a uchar pointer to the cl_mem data structure and this method will be removed.

There are some mixed implicitly/explicitly type conversion between
scalar and vector. Although the spec allows those conversion, I prefer
to make them consistent and use explicitly all the cases.
Signed-off-by: Zhigang Gong <zhigang.gong@intel.com>