added title
added view for a single bucket
added title to download icon
simplified code
now limiting the number of dmps to 5 per bucket (number can be
configured in `application.conf`)
now checking for new dumps on page load for better back/forward support.
changed order of tasks so duplicate dumps also get marked first, later
deleted
changed order of dumps so that oldest duplicates get deleted first
upgraded to play 2.2
analyzing work is now done in a round robin fashion in a configurable
number of worker actors. the number of parallel analysers can be
configured with `dmpster.analyzer.workers` (default is 2)