usage reporting needs kill-switch property file & reporting user guide on http://devstudio.jboss.com

We implemented a specific usage reporting for JBDS (opposed to the one that's present in JBoss Tools).
We now need 2 things on http://devstudio.jboss.com

• a property file that the plugin may access (it holds the kill-switch property. The one for jboss tools is at http://anonsvn.jboss.org/repos/jbosstools/workspace/usage/usage.properties):
  http://devstudio.jboss.com/usage/usage.properties

• a usage guide (we will provide) for the usage reporting at
  http://devstudio.jboss.com/usage