Make ClutterActor use ClutterContainer methods
Make ClutterActor use ClutterContainer methods

Every direct reference to ClutterGroup has been removed, in favour of
ClutterContainer - which is the official way of creating container
actors as of 0.4.

jigpu/clutter,jigpu/clutter,ebassi/clutter,djdeath/clutter,djdeath/clutter-android,Distrotech/clutter,heysion/clutter-clone,spatulasnout/clutter,jigpu/clutter,rkudiyarov/clutter_osx,heysion/clutter-clone,spatulasnout/clutter,djdeath/clutter-multithreaded,rkudiyarov/clutter_osx,jigpu/clutter,dlespiau/clutter,djdeath/clutter,collects/clutter,collects/clutter,tardyp/clutter,heysion/clutter-clone,nobled/clutter,djdeath/clutter-android,collects/clutter,Distrotech/clutter,ebassi/clutter,djdeath/clutter-android,Distrotech/clutter,djdeath/clutter-android,djdeath/clutter-multithreaded,nobled/clutter,rkudiyarov/clutter_osx,Distrotech/clutter,GNOME/clutter,jigpu/clutter,ebassi/clutter,spatulasnout/clutter,djdeath/clutter,dlespiau/clutter,djdeath/clutter-multithreaded,djdeath/clutter-multithreaded,rkudiyarov/clutter_osx,heysion/clutter-clone,djdeath/clutter,spatulasnout/clutter,kerrickstaley/clutter-vala,GNOME/clutter,ebassi/clutter,spatulasnout/clutter,jigpu/clutter,collects/clutter,nobled/clutter,heysion/clutter-clone,GNOME/clutter,Distrotech/clutter,GNOME/clutter,djdeath/clutter-android,kerrickstaley/clutter-vala,kerrickstaley/clutter-vala,kerrickstaley/clutter-vala,djdeath/clutter,ebassi/clutter,collects/clutter,tardyp/clutter,djdeath/clutter,Distrotech/clutter,dlespiau/clutter,GNOME/clutter,tardyp/clutter