[gtk+] (13 commits) Non-fast-forward update to branch wip/watson/progress-tracker

[Matthew Watson <watson src gnome org>]

The branch 'wip/watson/progress-tracker' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  0a2872a... progresstracker: simple struct to track animation progress
  8206d33... stack: port to progress tracker
  d5fd76e... stack: skip first frame for animations
  1e0cc5e... csstransition: port to progress tracker
  4e7741d... cssanimation: port to progress tracker
  68a3ff6... animatedstyle: fail to create new style if timestamp goes b
  cfa3cee... animatedstyle: just ref current style if timestamp the same
  a6c23a2... animatedstyle: rename function
  6a25f3e... styleanimation: don't take timestamp for static/finished
  5c23d2b... styleanimation: rename set_values -> advance_values
  79c4fa3... progresstracker: add GTK_SLOWDONW environment variable
  9983750... inspector: add slider to control slowdown factor
  dacd43a... revealer: port to progress tracker

Commits added to the branch:

  7827434... progresstracker: simple struct to track animation progress
  07133b2... stack: port to progress tracker
  c3457c6... stack: skip first frame for animations
  5364b7d... revealer: port to progress tracker
  5dbf495... csstransition: port to progress tracker
  44f3d19... cssanimation: port to progress tracker
  e28234f... animatedstyle: fail to create new style if timestamp goes b
  ec585a5... animatedstyle: just ref current style if timestamp the same
  c1cc14e... animatedstyle: rename function
  e8f44e5... styleanimation: don't take timestamp for static/finished
  7761273... styleanimation: rename set_values -> advance_values
  c3e04ba... progresstracker: add GTK_SLOWDONW environment variable
  dcd2587... inspector: add slider to control slowdown factor