Make sure the stager has all the runtimes it needs to support.

If running with Chef Solo, we can only use attributes.
Otherwise we rely on search to find all DEAs.
Runtimes don't really give us the name of the cookbook, so we still need to figure that out.
Bump dependencies; get rid of redundant Cheffile.
Add the cookbook name to metadata.
FC043: Prefer new notification syntax
Release 1.0.1: slightly improve the installation of runtimes.

More to come, especially to support other languages than ruby.
Bump git reference to pick up a few fixes.
Release 1.0.2 with an updated stager.
Revert back to a slightly older point in time in the git repo; some changes seem to be incomplete.

I will switch again to what is currently deployed on cf.com in a separate commit.
Attributes that depend on other attributes must be set in recipes.
Release 1.0.3: update git reference to a known-working version.