[gtk] (11 commits) Non-fast-forward update to branch mask-nodes

[Matthias Clasen <matthiasc src gnome org>]

The branch 'mask-nodes' 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:

  83a8a61... stroke: Fix gsk_stroke_equal
  7b81be1... gsk: Use stroke bounds in the stroke node
  a4afac0... Introduce mask nodes
  af2527e... gl: Add a shader for mask nodes
  5765f4d... Render fill and stroke nodes using the mask shader
  d05acfb... gsk: Add gsk_stroke_hash
  7bff5a4... gl: Add a path cache

Commits added to the branch:

  198c611... stroke: Add back some debugging (*)
  1e486a0... curve2: Add a way to compare to cairo (*)
  8194158... stroke: Fix gsk_stroke_equal
  31c7a2a... gsk: Use stroke bounds in the stroke node
  cb4efdf... Introduce mask nodes
  e4fe6fd... gl: Add a shader for mask nodes
  3823b93... Render fill and stroke nodes using the mask shader
  59804c5... gsk: Add gsk_stroke_hash
  3696de3... gl: Add a path cache
  1f45faa... curve2: Add a zoom slider
  47cce47... Apply scale for the path cache

(*) This commit already existed in another branch; no separate mail sent