[HOLD][#53420683] Updated the "Create an account for a spouse/co-guardian" page.

On [HOLD] until text content OK'd by support. 

![1](https://f.cloud.github.com/assets/2251119/1532580/9c4640d2-4c79-11e3-8233-411c873dd662.png)

![2](https://f.cloud.github.com/assets/2251119/1532583/9f702e80-4c79-11e3-90b3-dbcda2c2d75c.png)