Simplifying home page

1. Layout of links in opening material made more obvious.
2. Fewer recent blog posts and upcoming bootcamps.
![screen shot 2013-08-31 at 9 09 11 pm](https://f.cloud.github.com/assets/911566/1063303/25607b00-12a3-11e3-997c-42b1cb4ab357.png)