Add labels to show how long ago the latest checkin was
Make layout bootstrappier
Make the page actually look serviceable

- Fix ugly repeating background
- Differentiate between new and historical checkins
Remove unused CSS
Redesign history button
Change time label colors based on last checkin time
Fix date math, typo
Improve columnar layout, tweak date labels
Fix columns for firefox
Fix bug - time labels weren't updating automatically

- This code needs refactoring. Not very javascripty.
Refactor CurrentDate into a singleton
Merge pull request #3 from AlarmingCow/master

Mostly aesthetic changes - bootstrap and such