[tracker] (8 commits) ...Merge branch 'extractor-controller-thread'

[Martyn James Russell <mr src gnome org>]

Summary of changes:

  e4fd078... tracker-extract: Add controller thread (*)
  caf3f10... tracker-extract: Quit on pre-unmount if the mount point any (*)
  28d4b4b... tracker-extract: Keep the GSource itself in TrackerControll (*)
  e0beee6... tracker-extract: Handle errors when owning the bus name. (*)
  8093b8b... libtracker-common: Re-instate setrlimit() (*)
  dd83412... tracker-extract: Cleaned up logging (*)
  0114fbf... tracker-extract: Make sure we finalize the extractor object (*)
  9318125... Merge branch 'extractor-controller-thread'

(*) This commit already existed in another branch; no separate mail sent