Fix GitHub Capitalization Across Site

![codemontagegithubbefore-8](https://f.cloud.github.com/assets/226228/1961281/e8a01c40-826c-11e3-9e6e-278e0148e818.png)
![codemontagegithubafter-7](https://f.cloud.github.com/assets/226228/1961282/e9a4519c-826c-11e3-84fe-bae5b35f1559.png)