SMP2 core update

We are excited to announce progress in our testing of new SMP2 cores.
These cores use threads-based parallelization instead of MPI and, we
hope, should be much more robust than our first-generation SMP cores. 

The SMP2 cores are currently in testing; watch for future
announcements regarding their release. The first SMP2 core to be
released will be a Gromacs-based core with core number A3. In
conjunction with this release, we are implementing some updates to our
points benchmarking system. In particular, we will use
early-completion bonuses, which we have been testing with the bigadv
work unit program, more extensively for SMP2 cores.