Bootstrap a newly-installed device

[ke4roh]

Assuming this code can be dumped on the SD card as part of initialization (#10), create code that will:

1. Set up a wi-fi hot spot
2. Use that hot spot to accept configuration for location and internet
3. After being configured, fetch the rest of the radio code (or an update)

The bootstrap branch has code to start up the system, offer a wi-fi hotspot if the net isn't working, and offer configuration over that wi-fi. This task is to merge that into actual working functionality.