simplify and improve the way asynchronous send and receive are handled
handle pending asynchronous requests on finalize (should be harmless in
most cases, everybody should has completed)
revalidate tesh, no impact on time, but cleaning makes jupiter be the
last to finalize
Cosmetics: uncapitalize.
Make functions public, they are need by macros SMPI_SAMPLE_{DELAY,FLOPS}.
Cosmetics: adjust spaces.