[gtksourceview] Created tag 3.18.0

[Sébastien Wilmet <swilmet src gnome org>]

The unsigned tag '3.18.0' was created.

Tagger: Sébastien Wilmet <swilmet gnome org>
Date: Sun Sep 20 15:41:52 2015 +0200

    Release 3.18.0

Changes since the last tag '3.17.7':

Bernd Homuth (1):
      Updated German translation

Christian Hergert (1):
      css: add box-shadow to known properties

Jiro Matsuzawa (1):
      Updated Japanese translation

Marek Černocký (1):
      Updated Czech translation

Muhammet Kara (1):
      Updated Turkish translation

Rūdolfs Mazurs (1):
      Updated Latvian translation

Stas Solovey (1):
      Updated Russian translation

Sébastien Wilmet (3):
      Post-release version bump
      Fix license headers in StyleSchemeChooser files
      Release 3.18.0