Typo in comment
flush stdout before stderr writes, avoiding confusion when debugging.
make that change a little less ugly by using a procedure.
I considered using
	$stdout.flush if $stdout.tty?
but that doesn't help in vile, since both stderr/stdout are non-tty's
Framework to ignore files

Feature inspired by a Thomas Dickey <dickey@his.com> patch to ignore
files named `RCS` (managed by `permit`).
Warn about missing authors in map

Warn (once) for each RCS username that has no corresponding map entry.
The warning can be disabled.

Inspired by a Thomas Dickey <dickey@his.com> patch.
implement --expand-keywords option, which replaces the head/diff text that
was read from the archive file with the output from "co -p", thereby expanding
all of the rcs keywords.
Minor tweaks for expand_keywords
add a to-do for symbolic revisions.  I label releases, and omit files from
a label when the files have been deleted.
patch from Jonathan Neider, with one fixup - the emit_committer function has
to be outside the class-functions.

Conflicts:
	rcs-fast-export.rb