Add checking for clock_gettime() function.
Bump UPC_VERSION date to 20140812
Fix the search for posix shared memory (shm_open).  This is required
by Portals4 only and make it equivalent to configure process (even
though it might be useful for the SMP too in the future). Fixes #69.
Add support for NUMA and CPU scheduling affinity.  Verified
proper configuration on Linux x86_64 system.
Bump UPC_VERSION date to 20140813
Add -f[no-]upc-ir option for generating shared accesses IR.  On by
default.