starting to integrate openacc triad and maxflops
OpenACC Triad and MaxFlops initial versions

Triad is using acc async(), but not pinned memory, so no true duplex
transfers.
MaxFlops does not yet have the MAdd+SF or jumbo kernels (with increased
number of macro calls) to get near peak performance for some arch's.
some final cleanup of OpenACC MaxFlops and Triad