[pango] (10 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:

  5a44cdb... Small const correctness fix
  970f3ec... Fix a cast-align warning

Commits added to the branch:

  7db6886... Don't assert in pango_language_get_scripts (*)
  29c304f... Merge branch 'avoid-script-lang-crash' into 'master' (*)
  4ec19cd... Add some more language sample texts (*)
  25b057f... Merge branch 'more-sample-texts' into 'master' (*)
  8485a34... Make dependencies to libthai, cairo and xft optional. (*)
  51b2b22... Merge branch 'optional-dependencies' into 'master' (*)
  54b593e... Fix attr iterators with overlapping attributes (*)
  7dd4a84... Small const correctness fix
  0b9c264... Fix a cast-align warning
  553841a... Make test-layout work for generating data again

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