Merge branch 'master' of https://github.com/githwxi/ATS-Postiats
Updating: improving loop-macros.
Updating: merge
Updating: adding a minor example.
Updating: adding libc/stat
Updating: fixing a glitch in s2exp_hitypize.
Updating: improving libc/*
Updating: prepare for packaging.
Updating: fixing some small glitches.
Updating: minor addition.
Updating: preparing for ATS2-dist.
Updating: adding a missing file.
Updating: minor addition.
Updating: minor addition.
Updating: re-organizing a bit.
Updating: improving doc/DISTRIB
Updating: minor change.
Updating: differentiating tmp from tmpref.
Updating: adding a runtime file.
Updating: fixing up some minor issues.