UX/UI redo

[al-niessner]

The current work has reached the end of its life. Time to move onward. It will include:

1. rework of /app to /api losing all of the bad endpoints and building fresher more efficient ones
2. reuse as much of the current fe published work as possible
3. document the UX/UI design in the readme.
4. allow for dawgie.context.data_uix to be overridden replacing the some-to-all of the UI/UX static content that is distributed with dawgie while setting it None turns it off.