Dynamic SVG dashboard for repo readmes, displaying status, metrics, etc

Building https://github.com/tj/gh-polls today got me thinking, maybe it would be cool (kind of gimmicky) to have a single image you place in a project Readme, and it shows you an overview of metrics such as API latency, uptime, errors, CI status and others.

Basically an alternative to Geckoboard without paying for that, and your team automatically gets access to it since it's just in a readme or Wiki!

### Sooner

- [ ] optional animations
- [x] params for title, metric, stat, etc
- [x] timeseries
- [ ] timeseries error overlay similar to Heroku
- [ ] timeseries deployment annotations
- [ ] timeseries with comparison to previous period
- [ ] histograms
- [ ] metrics (simple request / error counts etc)
- [ ] alarm status
- [ ] uptime status
- [ ] billing related stuff?
- [ ] heatmaps for latency etc
- [ ] stacked bars might be nicer for requests/4xx/5xx errors
- [ ] maybe some Geckoboard style widgets for displaying MRR etc with percentage changes

### Later

- [ ] abstract out the datasource so it doesn't have to be CloudWatch
- Is there an open-source data fetching layer?
- [ ] themes
- [ ] date range switching