Facia tool: alert if press fails

Validates the modified date of the current front's pressed file, ten seconds after a publish event or after any edit when in live mode. A valid pressed date is one which is later than all that fronts' collections' modified dates.  

![error-connection](https://cloud.githubusercontent.com/assets/1147913/2631742/bcb372ea-be5c-11e3-8e76-091a801b2fc9.png)

![error-content-api](https://cloud.githubusercontent.com/assets/1147913/2631745/c04cdf54-be5c-11e3-88f4-ae294919fffc.png)