TODO before launch

[granawkins]

• [x] SSL
• [x] User tokens: generate on backend, keep in window, throttle
• [ ] Captcha: if throttle limit hits, require captcha before doing anything else
• [x] Favicon
• [x] Google Analytics
• [x] Log activity/stats/searches, expose somewhere
• [x] Add a license to the repo
• [x] Fill-in README