Shrinksafe complains during compression of map JS fixed.
It comes that "long" can't be used as a variable name as we did,
because Shrinksafe complains that "long" is a reserved keyword.
Shrinksafe script fixed to workaround Linux vs BSD stat packages.
Under MacOSX (BSD) the format for stat needs "-f" switch, while
under Linux stat needs "-c". Changed to use ls and awk, which
seem to be cross compatible.