Update the home-page info with the developer documentation
Update the home-page info with the developer documentation

Since there are so many components in openstack,
by describing the URL info in the configuration file,
it is more convenient to find the developer documentation
than from the unified portal

Change-Id: Id6bc554db8bb0cd71851773b9cea71aada4eb9e2

openstack/watcher,stackforge/watcher,openstack/watcher,stackforge/watcher