Allow user to preview render before submission of form

[JumperGerald]

This will use the 3d object viewer to show the user what the end result will be before the files have been uploaded.

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To accomplish this, we will use the same 3D viewer that will be in the client application to load files from local storage instead of pulling from firebase.

[johnRedden]

I added the code for the viewer this repo. Here is the link:
https://fnlvirtualmuseum.firebaseapp.com/viewer.html

[BusherBridi]

Would we just use a button that sends the client to the viewer if they press it before submitting the files to firebase?