Add splash/intro section to integration pages

This is a first pass at adding a "designed" section to the top of each integration page that includes:

- the name
- logo
- description
- version
- size
- download
- npm install

![screenshot 2014-10-08 18 24 55](https://cloud.githubusercontent.com/assets/29096/4568393/bc9e851a-4f39-11e4-8911-df11b01a2c18.png)