Improve manual test page ready to work on clicks
Click to open / close is basically working

TODO
- fix tests
- figure out how to integrate with cucumber-pro, since we need to be
  able to click directories to open them.

Maybe Cucumber pro should try to fetch a file, and if it can't find one,
just display the list of child docs? Where would it get the children
from? The node object that was passed out in the event should have
children.