Bug fix: altered the loop from a do/while to a simple while. Turns out, if there are no gadgets being requested, the do/while goes into an infinite wait, as "take()" will never return. A possible DOS attack vector, simply use up all the servlet processing threads. For this reason, I set the priority to Critical.
Allow extensions to modify (generally add) metadata as part of JsonRpcHandler.Job, by Guicing JsonRpcHandler and extending Job.
Enhancement: views may have attributes, they are now returned as part of the view metadata.