Basic client-side validation using ParsleyJS, closes #26

This PR implements basic client-side validation, specifically requiring the following fields:

- Name
- Address
- Confirmation checkbox

You can preview this new feature (preferably on multiple devices) at https://calfresh-v3-nofax-validation.herokuapp.com/ 

I'd love external review/edits for the wording of the error messages, shown below:

![screen shot 2014-07-28 at 1 33 26 pm](https://cloud.githubusercontent.com/assets/994938/3726932/906d62b0-1698-11e4-8306-d2ccc2da318e.png)

![screen shot 2014-07-28 at 1 33 32 pm](https://cloud.githubusercontent.com/assets/994938/3726933/932e14ae-1698-11e4-900f-af43ccfdc16b.png)

![screen shot 2014-07-28 at 1 33 19 pm](https://cloud.githubusercontent.com/assets/994938/3726938/9770b2f6-1698-11e4-948b-9f07ed30510f.png)