[gnome-calculator] Created tag 3.31.3

[Robert Roth <robertroth src gnome org>]

The unsigned tag '3.31.3' was created.

Tagger: Robert Roth <robert roth bee-tf ro>
Date: 1544447343 +0200

    Overview of changes in gnome-calculator 3.31.3
        * Added Alt+T shortcut for keyboard mode #81 (Robert Roth)
        * Use US prefix for non-imperial units #84 (Robert Roth)
        * Updated French translation (Guillaume Bernard)
        * Updated Spanish translation (Daniel Mustieles)
        * Updated Esperantoo translation (Kristjan Mustieles)

Changes since the last tag '3.31.2':

Daniel Mustieles (1):
      Updated Spanish translation

Guillaume Bernard (1):
      Update French translation

Kristjan SCHMIDT (1):
      Update Esperanto translation

Robert Roth (4):
      Use US in non-imperial unit descriptions (#84)
      Added Alt+T shortcut for keyboard mode (#81)
      Removed double space
      Prepared release 3.31.3