lttb

https://github.com/Jubke/lttb

The code has been translated from the work of Sveinn Steinarsson in his plugin for Flot charts. More information is available on [his page](https://github.com/sveinn-steinarsson/flot-downsample/), and you can find the thesis describing the algorithm [here](http://skemman.is/handle/1946/15343).