Feature/global alerts

Includes formatting for displaying global alerts to the user.

**< $mq-m**
![screen shot 2014-06-27 at 15 38 08](https://cloud.githubusercontent.com/assets/1579511/3413310/3b02d252-fe0a-11e3-8124-8e5b91d6b9ab.png)

**> $mq-m**
![screen shot 2014-06-27 at 15 39 40](https://cloud.githubusercontent.com/assets/1579511/3413311/3b034d04-fe0a-11e3-8762-3719a4fc1150.png)

Is related to https://github.com/moneyadviceservice/dough/pull/81