[tracker] (23 commits) Non-fast-forward update to branch sam/import-export

[Sam Thursfield <sthursfield src gnome org>]

The branch 'sam/import-export' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  d75e7c2... libtracker-data: Remove dead code in tracker-db-backup.[ch]
  6b50d1f... libtracker-data: Remove accessor for removed forceJournal p
  cae9f1b... Add tracker_sparql_connection_new_with_ontology(), disable 
  f621a88... libtracker-data: Don't create double transactions in LOAD
  b281fb8... libtracker-data: Fix crash when statement cache isn't initi
  bf29d77... cli: Create read/write connection for tracker-sparql
  5dd7bad... cli: Add `import` and `export` commands

Commits added to the branch:

  6907e7c... trackertestutils: Use DConf instead of config files (*)
  461b42b... trackertestutils: Don't index applications by default (*)
  e330296... trackertestutils: Always start D-Bus daemon in a new sessio (*)
  4c3c72a... trackertestutils: Fix crash on SIGINT (*)
  eec2b52... libtracker-data: Rewrite TrackerTurtleReader to reuse parse (*)
  b73a08a... libtracker-data: Drop old parser code (*)
  44ffa94... Merge branch 'wip/carlosg/ttl-parser' into 'master' (*)
  1b27e72... libtracker-data: Escape parsed strings (*)
  cebc5c2... docs: Fix TTL loader in ontology doc tool (*)
  719da71... Merge branch 'wip/carlosg/fix-ontology-docs' into 'master' (*)
  780cdc0... build: Fix a Meson warning (*)
  a79e140... build: Enable documentation builds by default (*)
  1fa1394... Merge branch 'sam/build-fixes' into 'master' (*)
  8958ec1... README.md: Replace mailing-list link with discourse (*)
  c2b88be... Merge branch 'wip/jfelder/readme-discourse' into 'master' (*)
  1be3e8c... Merge branch 'sam/sandbox-improvements' into 'master' (*)
  43cb734... libtracker-data: Remove dead code in tracker-db-backup.[ch] (*)
  d2197e9... libtracker-data: Remove accessor for removed forceJournal p (*)
  5ca92ed... Allow 'open with existing ontology', disable automatic re-i (*)
  d34dc6a... libtracker-data: Don't create double transactions in LOAD (*)
  0e11316... libtracker-data: Fix crash when statement cache isn't initi (*)
  0ac3fa9... cli: Create read/write connection for tracker-sparql (*)
  b0cd149... cli: Add `import` and `export` commands

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