Use svnrdump_sim.py to emulate svnrdump without an svn server.
Tests fetching, incremental fetching, fetching from file://,
and the regeneration of fast-import's marks file.
Signed-off-by: Florian Achleitner <florian.achleitner.2.6.31@gmail.com>
Acked-by: David Michael Barr <b@rr-dav.id.au>
Signed-off-by: Junio C Hamano <gitster@pobox.com>