Merge branch 'internal-flag' into ebassi-next

* internal-flag:
  conform: Add test unit for the destruction of Containers
  actor: Add internal child flag
  Clean up whitespace, indentation and comments

diff --cc clutter/clutter-actor.c
Simple merge

diff --cc clutter/clutter-actor.h
Simple merge

diff --cc clutter/clutter-main.c
Simple merge

diff --cc clutter/clutter-private.h
Simple merge

diff --cc doc/reference/clutter/clutter-sections.txt
Simple merge