Gregwar/Captcha — pull request #10 by thbourlove (2013-08-14 07:22:53+00:00)
Title: Hard to identify the phrase

The random angle and offset will make it hard to identify the phrase.
Like this:
![captcha](https://f.cloud.github.com/assets/1768066/960252/7d3e81a0-04b1-11e3-9d49-b9995a9a37e6.jpg)

I fixed some coding style at the same time.