[pan] (15 commits) ...shouldn't happen so log error

[Dominique Dumont <ddumont src gnome org>]

Summary of changes:

  8b80884... Rationalise the .gui.h files
  51c1147... Add a class which spawns an editor window
  e6dab2f... refactor post_ui to use spawner class for editing posts
  816d014... Preliminary work for editing score file
  e0bf909... Small cleanups after looking at PR
  9c36833... Clean up the mail sender code
  4db3985... Apparently ubuntu compiler is pickier
  d6cb56b... fix up glib includes
  eaca76c... Remove some fudging in file_util.h
  85f1446... Clean up the way the edit score menu works a bit
  8440cf6... Get hold of the correct scorefile name
  97db945... Update manual
  6112649... Merge branch 'master' of https://gitlab.gnome.org/GNOME/pan
  7b78a24... Fix embarrassing access to freed memory
  8be5523... shouldn't happen so log error