[gnome-photos] (15 commits) Non-fast-forward update to branch wip/rishi/buffer-decoder

[Debarshi Ray <debarshir src gnome org>]

The branch 'wip/rishi/buffer-decoder' 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:

  bf60f71... build: Split common code into a private shared library
  ab8519e... build: Ensure that the Git submodules are kept updated
  e6f81a0... Port to G_APPROX_VALUE
  e598fac... gegl: Add a function to calculate the inverse Jacobian for 
  ad4ec16... Add PhotosGeglBufferCodec
  f5610e1... Add PhotosGeglBufferLoader
  bb83dba... Add PhotosGeglBufferLoaderBuilder
  73c1cf0... Add PhotosGeglBufferCodecJpeg
  047115c... Add PhotosGeglBufferCodecPng
  735af25... Add convenience APIs
  fc261a6... base-item: ...
  c95447a... base-item

Commits added to the branch:

  bcc304d... tests: Style fix (*)
  58fd1c5... tests: Switch the UI tests to Python 3 (*)
  5bc14ce... tests: Respect the environment by using /usr/bin/env in the (*)
  e30a016... build: Ensure that the Git submodules are kept updated (*)
  8fb059b... build: Split some code into a private shared library
  f8c6218... Port to G_APPROX_VALUE
  7d74d12... gegl: Add a function to calculate the inverse Jacobian for 
  ca7f617... Add PhotosGeglBufferCodec
  a72049a... Add PhotosGeglBufferLoader
  0a4c2f0... Add PhotosGeglBufferLoaderBuilder
  f433dc2... Add PhotosGeglBufferCodecJpeg
  76190c3... Add PhotosGeglBufferCodecPng
  cf97bdc... Add convenience APIs
  3b144fd... base-item: ...
  0d77d23... base-item

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