qianlifeng/Wox — pull request #40 by cxfksword (2014-03-17 17:06:22+00:00)
Title: add Calculator system plugin

add a calculator plugin like alfred...

![snip20140318_2](https://f.cloud.github.com/assets/718792/2438818/54a8563c-adf6-11e3-8456-27ed42c5bdd3.png)