Add more locations
Rename selectors; add functionality; rename pathfinding.js to presentation.js
add logic to enable start/stop buttons
add functions to start and restart worker
Disable start button when a pathfinding operation starts
Remove Joe's house; no node
Use nodes.json, not Redis; load from file into RAM+webworker; adapt nodeCoords and adjNodes
Merge branch 'in-browser-kill-redis'