C++ wrappers over OpenVX 1.x API (#7550)
* initial commit
* fixing missing swap(refcount) bug
* removing dead code
* fixinf identation
* splitting c++98 and external refcount definitions
* fixing formatToMatType
* using vector instead of initializer_list for consistency with c++98 API
* IVX_HIDE_INFO_WARNINGS
* just in case a compiler doesn't do this
* removing copy functionality from ImagePatch, Image can be used for that
* stricter type checks
