fixed test compilation for gpu::Stream
Changed / for Matx to Matx::div, for symmetry with Matx::mul.
Merge pull request #1093 from jet47:fix-gpu-stream-test
Merge pull request #1124 from SpecLad:matx-div
moving version to 2.9.0,
also adding NVidia copyright
Merge pull request #1132 from apavlenko:master_ver_290