[shotwell] Created tag 0.27.4

[Jens Georg <jensgeorg src gnome org>]

The signed tag '0.27.4' was created.

Tagger: Jens Georg <mail jensge org>
Date: Mon Feb 5 19:32:50 2018 +0100

    Release Shotwell 0.27.4

Changes since the last tag 'shotwell-0.27.3':

Jens Georg (3):
      Fix folder sidebar with DAV
      Prevent crash when removing the event's last photo
      Prepare 0.27.4

Jordi Mas (2):
      Fixes to Catalan translation
      Update Catalan translation

Marek Cernocky (1):
      Updated Czech translation

Rafael Fontenelle (1):
      Update Brazilian Portuguese translation