WIP: Add support for Athena/Turin

[mathomp4]

This PR is an attempt to collect the changes needed to run S2S on Athena at NAS.

Current Status

I was able to run a c180 1440x1080 job on Athena with these changes. Some stats:

Run	Wall Time	Nodes	SBU Rate	Cores Per Node	Approx SBUs
Rome	15:53	18	4.06	120	20
Rome HT	26:23	9	4.06	240	16
Turin	12:53	9	12.20	240	24
Turin HT	13:53	5	12.20	480	14

S2S does seem to not hate using hyperthreading on the Turins.

It does run with hyperthreading on the Romes but was slower. It seems almost too slow, so I'm re-running

Build Updates

The main changes are a new Baselibs build as well as updates to the Make system. One to support MPICH and the other because of a pinstall issue.

Scripting changes

Well, I did try to update parallel_build.csh to work. I think it should work once I get the manual build working but...not sure.

NOTE: At NAS, I now try to have "sensible" defaults for parallel_build.csh. If you submit on pfe, you get rom_ait; on afe, mil_ait; and on athfe, tur_ath.

I also put in a bit of a hack in gcm_setup so that if you run that from Athena (or I guess TOSS5) you get a Turin job out.

What will be needed more is help from @qvis for all the scripting around the build to know about Turin. A simple example is gcm_setup but then we have all the things that ask "am I at NAS".

For Athena, that means you don't look for pfe but for athfe and compute nodes have hostnames like:

($node =~ x[0-9]*c[0-9]*s[0-9]*b[0-9]*n[0-9]*) ) then