3.0 seems like an appropriate time to do that.

also adding NVidia copyright

* converted it into Algorithm

used new CV_PERF_TEST_MAIN_WITH_IMPLS mechanism

Conflicts:
	modules/core/include/opencv2/core/version.hpp
	modules/ocl/include/opencv2/ocl/ocl.hpp
	modules/ocl/src/initialization.cpp
	modules/ocl/test/main.cpp
	modules/superres/CMakeLists.txt
	modules/superres/src/input_array_utility.cpp
	modules/superres/src/input_array_utility.hpp
	modules/superres/src/optical_flow.cpp