- put comments in lookup3.c
- replace uthash.h with newer version

- needs testing

- this change is in origin/master now

- doesn't work right yet for margo tests

- just does software build right now, does not include job script

- consistent with theta emails now for mail filter consistency

- gets ofi pingpong test running correctly again
- also commentted out some extra diagnostic runs for now

- use fork of mercury
- set run time option to prevent it from blocking (or initializing cci
  in a way that allows blocking)
- re-enable HG_Finalize calls in tests

this functionality requires a c99 compiler, which may not be
available on all systems