SLING-3009 : adding a new section 'Install' to the sling launchpad server config - used to configure the type of installing (locally via SLING-3019 or via mvn sling:install)

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1518231 13f79535-47bb-0310-9956-ffa450edef68
SLING-3029 : add debug port config to the sling launchpad server

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1518232 13f79535-47bb-0310-9956-ffa450edef68