AnalyticalGraphicsInc/cesium — pull request #1063 by shunter (2013-08-22 18:33:13+00:00)
Title: Show an error panel when a render loop error occurs. 

Previously, a default `CesiumWidget` or `Viewer` would silently "freeze" if an error occurred, because by default nothing listens to the `onRenderLoopError` event.

Also use the same error panel to indicate when other errors occur in CesiumViewer.

An easy way to test this until #1052 gets fixed is to use the `Base Materials > Fresnel` option in the Materials Sandcastle example, or by running the CesiumViewer app and dropping random junk into the window or loading junk via a query parameter.