Cesium demos in general

Hi guys. The Sandcastle gallery now features “Edit” and “Run” buttons for each demo. “Edit” loads the demo into Sandcastle, and “Run” just links to the actual HTML file containing the demo, so it runs standalone.

My intention is that all Cesium demos will operate like this, in fact the “Skeleton” demo itself will be a member of the gallery rather than its own stand-alone thing. You’re able to “Run” the skeleton demo standalone as normal from its new “Run” button, and/or edit it in Sandcastle along with other demos.

So, the Sandcastle demo gallery becomes the demo gallery for Cesium, and all demos can be run or edited at the user’s whim.