Move to a coordinate system that is based on user screen length

[JeffThorslund]

We do not want svg elements to appear stretched, so the svg viewbox should match the users screen dimensions.

This will involve reading setting the viewbox based on user window dimensions, adjusting the hook that reads user coordinates, and changing how we bring in data. The data will have to be converted from a standard (100x100 like we have now works) to the new coordinates.