developer release 3.1.2

[R Clint Whaley <rwhaley@cs.utk.edu>]

Guys,

The new developer release is out, and available from the usual site.  This
one includes Camm's SSE-enabled SGER and SGEMV, plus various upgrades
in config and mvsearch to support it. Also, fixes the reported errors
in Level 1 C blas, and linking problems with Level 2 packed BLAS. 

Camm, let me know if what I've done with your stuff is OK or not.

Thanks,
Clint