Add GetSatisfaction to JSON, Activity to embed JS #8

#8 

#### Changes

* Adds GetSatisfaction stats to ossap stats JSON (needs testing in prod to see results)
* Add aggregated messages (10 per site) to ossap stats JSON
* Adds aggregated messages (custom size, unordered list) to embed JS

#### Screenshots

##### The new aggregated messages data

![screen shot 2014-01-15 at 11 58 45 am](https://f.cloud.github.com/assets/228733/1922411/54b88af4-7e06-11e3-906b-52e6014d3550.png)

##### The new OSSAP stats openscholar settings

![screen shot 2014-01-15 at 11 43 36 am](https://f.cloud.github.com/assets/228733/1922402/3648ac2a-7e06-11e3-854c-d242638374c1.png)