[tracker] (9 commits) Non-fast-forward update to branch sam/examples

[Sam Thursfield <sthursfield src gnome org>]

The branch 'sam/examples' 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:

  4098273... examples: Rename `introspection/python` -> `python`
  26340c7... examples: Remove miner example
  53d313a... examples: Remove all-async.py query
  0740785... examples: Add endpoint example
  af9760e... examples/python: Update to Python 3 and add automated testi

Commits added to the branch:

  3d88fc6... build: Inherit systemd_user_services option from parent pro (*)
  6387956... Merge branch 'sam/systemd-default-option' into 'master' (*)
  eaf2b0b... examples: Rename `introspection/python` -> `python`
  880aa16... examples: Remove flatpak example
  1024f1d... examples: Remove miner example
  43e572f... examples: Remove all-async.py query
  8fbf608... examples: Move Python query examples to tracker-miners.
  f093324... examples: Add endpoint example
  836cfa9... examples: Add README

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