Add debian/source/format file.

And set "3.0 (quilt)" so that the patch series is automatically applied by the
Launchpad builder.

This requires the deletion of `.bzr-builddeb`, which is in the upstream
Launchpad repository but not in the official distro tarball. Otherwise:

dpkg-source: info: local changes detected, the modified files are:
 mountall/.bzr-builddeb/default.conf
dpkg-source: error: aborting due to unexpected upstream changes
Shim the upstream lp:ubuntu/raring/mountall repo.

The mountall_2.47.tar.gz source tarball that is currently published in the
raring pre-alpha is different than its upstream lp:ubuntu/raring/mountall
source repository. Patch away the difference so that `dpkg-source` will accept
builds for this branch.
PPA 2.47-zfs3 release for raring.