GIT reorganization

Hi,

FYI

I have modified the relative references to the GIT submodules from e.g.,
../packages/chr.git to ../packages-chr.git.  This modification is done
to prepare moving the git repos to github, which does not allow for
a directory hierarchy.  Github provides a nicer interface to the
repositories, better repository sharing with other developers and a
better issue tracker.

The script `./prepare` detects the modified location and runs
`git submodule sync`.

I'm not yet sure when the final transition will happen.  The plan is
to keep both repositories in sync for quite some time to make the
transition smooth for all of us.

	Cheers --- Jan