By generating SVGs on demand, the Download SVG button doesn't have to always give the saved version of the map

[shannonturner]

This wouldn't be too hard to do, though it does add a lot of complexity.

1. Would want to create these in a temporary directory that's cleared out quickly
2. Would want to gate the ability to generate SVGs behind recaptcha
3. Would want to provide a drop-down menu with all of the options, because having as many as four buttons is a little silly:
   • Current map, PNG
   • Current map, SVG
   • Original map, PNG
   • Original map, SVG
4. Would require a slight refactor of SVG generation to make it generate even when there's not a SavedMap object