This reverts commit a7619f7e.

This reverts commit ce18f350.

This reverts commit 1120019c.

This reverts commit 65b25496.

This reverts commit 7358d11d.

This reverts commit bff83f53.

This reverts commit 2537caf0.

we are keeping the old method of installing from git, which means we
will install post-alpha2 code when there are commits to the frontend,
but meh - we currently can't install alpha2 at all from git, so that's
better.

we at least need to download the hostmaster profile in aegir.make, but
then that means it will recurse into hostmaster.make, so it means we
need to fiddle with *that* code if we want have sticky branches there.

the other alternative is to build from the distribution, but that's
not supported by Drush make, only by pm-download.

This reverts commit 738fad24.

This reverts commit aa8d057c.

This reverts commit 836ab5d3.

This reverts commit 0a4d405c.

This reverts commit 37b28445.