Add API documentation to ClutterBehaviourRotate. Also add properties handling.
Add API documentation to ClutterBehaviourRotate. Also add properties
handling.

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