git checkout with -q
Recent NetBSD source require overriding LIBCRTI

checkout.sh doesn't yet use those sources, but fix this anyway
in case someone wants to use HEAD.
support arbitrary revisions for checkoutcvs.  issue #48
some minor (and gratuitous ;) changes
Include buildrump.sh date info in tarball directory name.

This is useful in cases where you extract multiple different releases
into the same parent directory.
use git ls-files to decide which files go into the tarball
add some sanity checks
Allow to override sanity checks with -f.
Create a README in the tarball.
more info in README
detect when running from tarball and do not default to checkout then
print more diagnostics if working dir is not clean
set IFS so that branch check still works
get the branch check right too (it helps!)
note that we'd _like_ to have things in UTC. maybe some day
use tmp name while archiving tarball
Update README.md

Changed from "Arch core" to "Arch extra" on OBS
note mailing list
fix test operator
consistent indentation.  no functional change