[shotwell] (15 commits) Created branch wip/cleanup-facedetect

[Jens Georg <jensgeorg src gnome org>]

The branch 'wip/cleanup-facedetect' was created.

Summary of new commits:

  fa46244... Switch to C++17
  974bc44... Clean-up header file
  e44bc73... Let FaceRect serialize itself to Variant
  f7adf3f... Simplify FaceRect serializer
  53e80ba... Simplify other variant serializer
  9e558e9... Simplify faceToVec
  bc4797d... Fix linter warning regarding bool use
  378ff58... Simplify authorize call with g_autoptr
  9ab62d3... Remove face_to_vec
  9d24dc1... vec is initialized in the FaceRect constructor
  77e44ea... Remove some reinterpret_cast use
  ac8af97... Be more resilient if service comes and goes
  5e9f4e9... Update haarcascade
  04ac814... Ignore errors from load_net.
  7a9b553... wip: breaks vala