[gtk] (7 commits) Non-fast-forward update to branch matthiasc/for-master

[Matthias Clasen <matthiasc src gnome org>]

The branch 'matthiasc/for-master' 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:

  f8c12d2... gl: Make debug spew more complete
  503cbcb... popup: Fix up a doc blurb
  31bf34f... NEWS: Updates
  915e2e0... Add a test for various texture uploads

Commits added to the branch:

  3d88175... gl: Make debug spew more complete (*)
  6cdbf1a... popup: Fix up a doc blurb (*)
  d6912a6... More texture upload fixes (*)
  fe8986f... Merge branch 'matthiasc/for-master' into 'master' (*)
  54944c9... Merge branch 'fix-texture-upload-more' into 'master' (*)
  ae09e20... NEWS: Updates
  d56ad7c... Add a test for various texture uploads

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