working on issue #12
working on issue #12

Removed zoomExtents call from the jsonloader.loadSceneFromJson function.
zoomExtents should now be called by the [library] user whenever they
like.  I am calling internally the first time the viewer loads, and
whenever opens a file using the UI.

tt-acm/Spectacles.WebViewer,tt-acm/Spectacles.WebViewer