[gtk] (12 commits) ...Merge branch 'fix-memleaks' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  c52c944... Updates (*)
  23706a4... release: Actually include docs (*)
  34883b7... reftests: Plug a few memory leaks (*)
  e7f9d56... ngl: Fix an uninitialized read (*)
  97a9e23... bookmarklist: Avoid an invalid read (*)
  7644605... Plug a small memory leak (*)
  8994635... settings: Plug a memory leak (*)
  0c6da97... builder: Add an assertion (*)
  4cf69fb... builder: Plug a small memory leak (*)
  45f4090... stack: Don't leak the pages property (*)
  afc3de6... notebook: Don't leak the pages property (*)
  926b855... Merge branch 'fix-memleaks' into 'master'

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