Allow configurable directory structure.

[Isaak-Malers]

The chrome extension AND the test runtime code need to be able to pull in, save, and manipulate datasets from arbitrary disk locations. The data set will always have the format:

• data-model/
  • images/
  • backups/
  • app-map.json

Required for this task:

Code that can recognize when a directory matches this structure, which will be used on the front-end and the back-end.

Obverse constructor should take a path, which will be used to find this code.

Chrome extension will need a "save" and "save-as" button to save to a stored location, as well as to save to a new location. I think the chrome extension should take over the responsibility of creating new, "empty" data directories.