Resize textboxes on service availability page

- The textboxes should indicate by their size how much content is expected
- 20 words is too many to easily count by eye, so we should provide a word count

![screen shot 2014-10-06 at 16 04 19](https://cloud.githubusercontent.com/assets/355079/4527857/5fe8f308-4d6a-11e4-8a24-1c5f67d17b15.png)