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.

we were constantly changing to git, but we are always using git to
download the goods in the makefile now for some reason

Conflicts:

	release.sh

mig5 authored Dec 22, 2010 and mig5 committed Dec 22, 2010

re-instate hardcoded aegir version in the two shell scripts, which can't depend on provision already being present.