[docs] Update requirements and release notes
[docs] Update requirements and release notes

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