Update the getting started docs

This moves stuff around a bit (e.g. parts that were in CONTRIBUTING but belong
to INSTALL), updates the coding process description (we're on Stackforge and
Launchpad now) and adds some reasonable defaults to the sample config file.

Change-Id: I73e98d54b9df0afb9db7bb95239af78511731d16
Signed-off-by: Tomas Sedovic <tsedovic@redhat.com>
Merge "Update the getting started docs"