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.

This reverts commit 37b28445.

This reverts commit e921cf31.

This reverts commit f69dbe28.

This reverts commit 31dd9c48.

This reverts commit 8e2f13d8.

This reverts commit 018e73e5.

This reverts commit 86fcb678.

This reverts commit 37009be3.

This reverts commit 57b40501.