[libdazzle] Created tag 3.27.91

[Christian Hergert <chergert src gnome org>]

The signed tag '3.27.91' was created.

Tagger: Christian Hergert <chergert redhat com>
Date: 1519162884 -0800

    release 3.27.91

Changes since the last tag '3.27.90':

Christian Hergert (7):
      Merge branch '6-use-of-enum-before-it-being-declared' into 'master'
      Merge branch 'graph-model-columns' into 'master'
      abi: set default visibility on symbols to hidden
      build: remove old dazzle.map linker script
      Merge branch 'wip/lantw/fix-gtk-doc-build' into 'master'
      tab: use title for DzlTab tooltips
      release 3.27.91

Robert Roth (2):
      Fix #6: move enum typedef after enum declaration
      Fixes #7: method to query GraphModel column count

Ting-Wei Lan (1):
      doc: add two files and use full path in private_headers