Merge remote-tracking branch 'kpfell/master'

* kpfell/master:
  added scheduled tasks for updating nodesAlive and nodesContent
  updated roots because f1lesystem change
  hashing and hash ring objects
  updated test for Chomp.getBlob
Update to latest f1lesystem APIs
Remove Catalog.fs (no longer needed)
Ohter misc. minor changes
First draft of DatabaseClient
resolving merge conflict in chomp?