Add people to companies card

/cc @commuterjoy

Added links to people streams for top three company employees. Not very good currently as a lot of them will link to empty streams (e.g. people:"Lawrence page" doesn't exist for us as we call him Larry Page)

![screen shot 2014-12-12 at 12 33 05](https://cloud.githubusercontent.com/assets/1978880/5411683/196f334a-81fb-11e4-9181-346ad6607ed3.png)