If you've built an app that caches a Twitter user's avatar,
and that user changes their avatar […], the link breaks, thus breaking your app.
<img src="http://headhunter.heroku.com/[twitter_username]" />
143 hits on the Twitter API remaining for the next 27 minutes before the counter is reset to 150.
Green indicates that the remaining API hits are roughly enough to get us through the next hour.
Meter courtesy of Google Chart Tools