Update jsfiddle with working cdn
Update jsfiddle with working cdn

RawGit has shut down, and because of this the link in our readme no longer works. This PR migrates the jsfiddle example to use jsDelivr instead.
looeee/three.js,jpweeks/three.js,mrdoob/three.js,kaisalmen/three.js,Liuer/three.js,06wj/three.js,fraguada/three.js,looeee/three.js,Samsy/three.js,fraguada/three.js,stanford-gfx/three.js,fraguada/three.js,fraguada/three.js,zhoushijie163/three.js,greggman/three.js,greggman/three.js,donmccurdy/three.js,zhoushijie163/three.js,fraguada/three.js,stanford-gfx/three.js,aardgoose/three.js,Liuer/three.js,makc/three.js.fork,fyoudine/three.js,fraguada/three.js,jpweeks/three.js,Samsy/three.js,Samsy/three.js,Samsy/three.js,gero3/three.js,donmccurdy/three.js,Samsy/three.js,mrdoob/three.js,makc/three.js.fork,kaisalmen/three.js,fyoudine/three.js,Samsy/three.js,WestLangley/three.js,aardgoose/three.js,WestLangley/three.js,gero3/three.js,06wj/three.js