[docs] Add Animation get_type() function
[docs] Add Animation get_type() function

We need to reference clutter_animation_get_type() if we want the
properties, signals and object hierarchy to show up in the API
reference

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