[Shotwell] Shotwell 0.31.2

[Jens Georg <mail jensge org>]

Hello everyone, 

a new UNSTABLE release of Shotwell is available. Changes since 0.31.1
are:

  * Documentation updates and clean-up
  * Drop obsolete settings
  * Add WEBP and GIF to viewer's desktop file
  * Use new mapbox tiles for the map view
  * Flickr: Upload description and title
  * General OAuth1 clean-up and simplifications
  * Flickr: Show the new quotas (images uploaded)
  * Make face detection and recognition compatible with OpenCV 4
  * Fix shortcuts for previous/next photo in menus
  * Migrate GSettings from org.yorba to org.gnome
  * Fix initialization of the theme being too late
  * Bring some consistency into the settings summaries and descriptions
  * Google Photos: Fix a critical when target album is not available
  * YouTube: Remove an obsolete label from the publishing dialog
  * Authenticator: Make links in the shown web page open in external
browser
  * Google Photos/YouTube: Update explanatory texts before log in.
  * Flickr: Fix the log in
  * Many translation updates

Bugs fixed in this release:
 - https://gitlab.gnome.org/GNOME/shotwell/issues/157
 - https://gitlab.gnome.org/GNOME/shotwell/issues/193
 - https://gitlab.gnome.org/GNOME/shotwell/issues/212
 - https://gitlab.gnome.org/GNOME/shotwell/issues/216
 - https://gitlab.gnome.org/GNOME/shotwell/issues/217
 - https://gitlab.gnome.org/GNOME/shotwell/issues/221
 - https://gitlab.gnome.org/GNOME/shotwell/issues/223
 - https://gitlab.gnome.org/GNOME/shotwell/issues/226
 - https://gitlab.gnome.org/GNOME/shotwell/issues/242

Merge requests included in this release:
 - https://gitlab.gnome.org/GNOME/shotwell/merge_requests/33

All contributors to this release:
 - Jens Georg <mail jensge org>
 - Piotr Drąg <piotrdrag gmail com>
 - Daniel Mustieles <daniel mustieles gmail com>
 - Yuri Chornoivan <yurchor ukr net>
 - Anders Jonsson <anders jonsson norsjovallen se>
 - sicklylife <translation sicklylife jp>
 - Cheng-Chia Tseng <pswo10680 gmail com>
 - Andre Klapper <a9016009 gmx de>
 - Justin van Steijn <jvs fsfe org>
 - Kukuh Syafaat <kukuhsyafaat gnome org>
 - Rafael Fontenelle <rafaelff gnome org>
 - scootergrisen <scootergrisen gmail com>

Added/updated translations:
 - es.po, courtesy of Daniel Mustieles
 - id.po, courtesy of Kukuh Syafaat
 - ja.po, courtesy of sicklylife
 - nl.po, courtesy of Justin van Steijn
 - pl.po, courtesy of Piotr Drąg
 - pt_BR.po, courtesy of Rafael Fontenelle
 - sv.po, courtesy of Anders Jonsson
 - te.po, courtesy of Krishnababu Krothapalli
 - uk.po, courtesy of Yuri Chornoivan
 - zh_TW.po, courtesy of Cheng-Chia Tseng