[gnome-maps] Created tag v3.31.1

[Marcus Lundblad <mlundblad src gnome org>]

The signed tag 'v3.31.1' was created.

Tagger: Marcus Lundblad <ml update uu se>
Date: 1539027274 +0200

    Release 3.31.1

Changes since the last tag 'v3.30.0':

FlyingPiMonster (2):
      mapView: Start all the way zoomed out at (0, 0)
      DOAP: Fix bug-database to point to GitLab

Jakub Steiner (1):
      icon: update app icon

Marcus Lundblad (3):
      icons: Move app icon to the "apps" subdirectory
      mainWindow: Make file chooser instance a property on "this"
      Release 3.31.1

Stas Solovey (1):
      Update Russian translation

Марко Костић (1):
      Update Serbian translation