Part one of parse rewrite; set up a ValenceButton view.
Implement chooser groups.
Hook up "valence groups".
Semi-working preferences, though spaces are still broken.
Working space handling.
Debounce saving so we don't spam Parse's servers.
Super-janky menu integration.
Move underscore into External_Libraries.
Hook up menu to use the new Parse data.
Fix a bunch of CSS stuff.
Dead simple login page, not working yet.
Hacky login functionality. Not the best code in the world, but it should work.