Remove pragmas that promote certain serious warnings to errors on
windows. For obvious reasons, such warnings ought to be fixed.
Making compilation abort is the sledgehammer method to force that.
It's a stupid method for us, as we develop on various platforms, and
don't test every single commit under Windows. It gratuitously breaks
programs that work fine. Leave them as warnings, and fix them on
sight.
(edit): Rewrite of undocumented and broken feature: if there are extra
arguments, they are interpreted as key-value pairs, and edit does not
prompt for more. From Ron Koenderink.
(player_coms): Document extended syntax.
(decl): Remove broken and redundant check of declarer's country
number. Check is redundant, because invalid values can come only from
natarg(), and those are checked above. Check is broken because
natarg() returns negative value on error, not 255.
Makefiles worked only if certain directories and generated files were
already present. Source distributions had them, but we didn't commit
them to CVS. Fix Makefiles.