[gnome-2048] Created tag 3.31.91

[Arnaud B. <arnaudb src gnome org>]

The unsigned tag '3.31.91' was created.

Tagger: Arnaud Bonatti <arnaud bonatti gmail com>
Date: 1550563391 +0100

    Release 3.31.91.

Changes since the last tag '3.31.90':

Anders Jonsson (1):
      Update Swedish translation

Arnaud Bonatti (33):
      Make some methods static.
      Unduplicate more.
      Move code.
      Make more methods static.
      Update grid settings when loading.
      Do not crash on bad file.
      Store values as power of 2.
      Store values as uint8.
      Hey, uint64.try_parse exists!
      Improve a bit tile rendering.
      Fix score.
      Calculate score on the fly.
      Move and clean code.
      Update copyright infos.
      Keep custom size at restoration.
      Introduce GameWindow.
      Use GtkBuilder for ClutterEmbed.
      Introduce GameHeaderBar.
      Do not notify when unneeded.
      Add tests infrastructure.
      Add a test.
      Add another test.
      Allow spaces in saved game.
      Improve loading of complete game.
      Move TestGrid near tests.
      Improve test.
      Move and improve code.
      Avoid some racy crashes.
      Rework TileView init.
      Rework TileView init (2nd try).
      Bump Gtk required version.
      Small cleaning.
      Prepare 3.31.91.

Ask Hjorth Larsen (2):
      add da to LINGUAS
      Updated Danish translation

Fabio Tomat (1):
      Update Friulian translation

Jiri Grönroos (1):
      Update Finnish translation