Start of frustum debug
Merge remote-tracking branch 'origin/master' into debugfrustum
Initial frustum debug
Merge branch 'batchingdebugcommand' into debugfrustum
Added debug for number of frustums a command is executed in
Merge branch 'master' into debugfrustum
Prevent the HomeButton to alter the ScreenSpaceCameraController settings during animation as they might not be always restored
Merge remote-tracking branch 'origin/master' into debugfrustum
Fix bad merge
Remove references to unexisting onComplete function
Avoid an error if the file extension is not recognized.
Show an error panel when a render loop error occurs.

Also use the same error panel to indicate when an error occurred when dropping a file into CesiumViewer.
Use error panel for errors instead of alert.
Log errors to console by default when showRenderLoopErrors is true.
March ray ellipsoid intersection for oblate ellipsoids.
Merge branch 'master' into ellipsoidPrecision
Merge branch 'master' into debugfrustum
Shader improvements for debug frustum
debugShowFrustum test
Fix frustum stats