Proposal three steps alternative design

Finished up an idea of mine on how to show the three steps interface. Uses text message bubbles to show the first two and uses a vague keyboard shape for the third. This design emphasizes the steps by suggesting what each of them would entail (text message and then computer device). Also fixes up font sizes and spacing for this part of interface. Did not touch form part yet.

Attached screenshots of both full screen view (lg) and mobile (xs).

![screenshot from 2014-08-03 16 36 59](https://cloud.githubusercontent.com/assets/1701077/3792164/2b295118-1b69-11e4-9c72-337eafc3ad2e.png)

![screenshot from 2014-08-03 16 37 28](https://cloud.githubusercontent.com/assets/1701077/3792165/312bb01a-1b69-11e4-8988-ca93f7a8f50e.png)