Updated readme.
Updated readme.

Added note about Debian.
Added sample `catalog.xml` `brooklyn.properties` to run Drupal with Debian in Rackspace US.
Removed MapR boilerplate.
cloudsoft/brooklyn-social-apps,aledsage/brooklyn-social-apps,cloudsoft/brooklyn-social-apps,aledsage/brooklyn-social-apps,aledsage/brooklyn-social-apps,cloudsoft/brooklyn-social-apps