[gtk] (9 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:

  f5bf61f... Add sizes to toplevelsize warnings

Commits added to the branch:

  bef86d4... roaring.[ch]: Add attribution and licensing information (*)
  dfb1601... Include a copy of the Apache license (*)
  95cd8c1... Move roaring bitmaps code to gtk/roaring/ and add a README (*)
  e16d108... Fix a string (*)
  d0b1923... Merge branch 'afranke-master-patch-25531' into 'master' (*)
  40c32bb... Update Ukrainian translation (*)
  e0b95c6... Merge branch 'wip/smcv/roaring-license' into 'master' (*)
  540cffe... gtk-demo: Drop the pixbufs demo
  9b0a5b1... Add sizes to toplevelsize warnings

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