Upstream branch is the master branch of the upsream package. Versions are
tags on it. Pristine-tar is used to store tarballs.

Don't use gbp import-orig, as the upstream branch already exists. Commit
tarballs directly with 'pristine-tar commit'.

Git-buildpackage is used for building and its pq (patch-queue) is used to
maintain patches (currently a single one).
