preliminary support for 'cvs ls' subcommand

[Alexey M. <al...@hs...>]

>>>>> "AM" == Alexey Mahotkin <al...@hs...> writes:

AM> ACLs are also supported, too (though not tested).

AM> The only thing left is support for tags (see original cvsweb);
AM> Alex, do you need anything else from 'cvs ls'?

I think I've mostly implemented tag support.  That is, you may say

	$ cvs ls -R -r BRANCH module/sdir/

and get what is expected.  Dates are not currently supported, because
of a small yet unresolved issue.  I guess it's needed only for
completeness.

Committed,

--alexm