Show marathoner's current streak

### Content

  * Import Underscore.js to render html templates.
  * Fetch member's streak with the [YQL public API](https://developer.yahoo.com/yql/?dataTypeRadios=JSON).

### Preview

  ![image](https://cloud.githubusercontent.com/assets/4541323/4778883/cceb5f66-5c08-11e4-83cf-dae4d140028c.png)