Add multiple claimants to the flow (WIP)

- [x] Add multiple claimants to the flow
- [x] Hypenate URLs #296 
- [x] Non-JS solution to non-destructively add claimants
- [x] i18n
- [x] Styling
- [x] Progressive reveal
- [x] Destruction of arbitrary claimants
- [x] Progressive enhancements
`javascript:void(0);` 

![jz85pgu](https://cloud.githubusercontent.com/assets/18622/4976825/09966ff2-68e1-11e4-894b-96e554be7eb7.gif)

Merging this PR now, but can you take this out please? Also The link is shown even with one empty claimant form. That needs to be fixed too. Will create an issue for that.