Add git ignore file, for people using git-svn
Add git ignore file, for people using git-svn

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