support limited html in ticker text

fixes #396.  Tags supported are in the model.  frontend.js had to be recompiled due to change in ticker.js.  some vertical tab bootstrap support was pulled into the assets.  tile shows markup intentionally, default render renders html.  

Would like to replace "..." with fontawesome's [spinner](http://fontawesome.io/examples/)
```<i class="icon-spinner icon-spin icon-large"></i>``` 
once the new fontawesome PR #422 gets merged.