[tracker] (16 commits) Created branch wip/carlosg/direct-rewrite

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/direct-rewrite' was created.

Summary of new commits:

  9904993... libtracker-direct: Rewrite in C
  fb35038... libtracker-direct: Add internal TrackerDataManager getter
  dec325b... tracker-store: Do not freeze events during TTL load
  e8d289e... libtracker-data: Remove TRACKER_DB_MANAGER_REMOVE_CACHE fla
  96d23d6... libtracker-direct: Add internal function to set additional 
  6f3ef3c... libtracker-direct: Add sync() call
  80577dc... libtracker-data: Drop CommitType
  e172e7c... libtracker-data: Move TrackerClass event maintenance to tra
  9332c99... tracker-store: Do immediate GraphUpdated emission checks on
  45293ed... tracker-store: Protect event batches with a mutex
  69797f9... tracker-store: Give ownership of writeback events on get_re
  daac318... tracker-store: Refactor writeback signal emission into sepa
  dd50363... tracker-store: Protect ready writeback events with mutex
  14f088f... tracker-store: Push TrackerData hooks down to Tracker.Store
  d01531e... libtracker-data: Move notify_transaction() down to libtrack
  9440354... tracker-store: Use TrackerDirectConnection underneath