- removed tr1 usage (dropped in C++17)
- moved includes of vector/map/iostream/limits into ts.hpp
- require opencv_test + anonymous namespace (added compile check)
- fixed norm() usage (must be from cvtest::norm for checks) and other conflict functions
- added missing license headers

used BufferPool mechanism instead

This reverts commit fba72cb6, reversing
changes made to 02131ffb.

This reverts commit ab25fe9e.

added GPU non local means brute force filter + tests