SLING-2985, SLING-3009, SLING-3029 : various new features activated in the plugin:
 * support for sling.content facet
 * support for connecting to a launchpad server in debug mode
 * various improvements to the content-browser

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1518251 13f79535-47bb-0310-9956-ffa450edef68