afeld/mustachio — pull request #18 by brentertz (2014-01-07 18:38:01+00:00)
Title: Preserve background transparency during image composition

Demo Image:
![demo](https://f.cloud.github.com/assets/202773/1861994/7be17678-77ca-11e3-826d-030606b48aa2.png)

Original Image:
https://f.cloud.github.com/assets/202773/1861998/8b6718a0-77ca-11e3-90d6-194007c3615b.png