[simple-scan] Created tag 3.31.91

[Robert Ancell <rancell src gnome org>]

The signed tag '3.31.91' was created.

Tagger: Robert Ancell <robert ancell canonical com>
Date: 1550506430 +0100

    Released 3.31.91

Changes since the last tag '3.31.90.1':

Alan Mortensen (1):
      Updated Danish translation

Baurzhan Muftakhidinov (1):
      Update Kazakh translation

Charles Monzat (1):
      Update French translation

Daniel Korostil (1):
      Update Ukrainian translation

Daniel Mustieles (1):
      Updated Spanish translation

Daniel Șerbănescu (2):
      Update Romanian translation
      Update Romanian translation

Efstathios Iosifidis (1):
      Update Greek translation

Matej Urbančič (1):
      Updated Slovenian translation

Piotr Drąg (1):
      Fix Icon in Slovenian and Ukrainian translations

Robert Ancell (2):
      Refactor image saving code
      Releasing 3.31.91

Tim Sabsch (1):
      Update German translation

Victor Mireyev (2):
      Save button should be disabled while file is saving.
      Do not override existing file if user does not want to do it.

Yi-Jyun Pan (1):
      Update Chinese (Taiwan) translation