Make signin and register cta more visible

Moved the CTA for signin and registration to the right of the page on desktop.

# Before

## Registration
![screen shot 2014-10-13 at 16 39 17](https://cloud.githubusercontent.com/assets/2305016/4616036/a7cb0e74-52ef-11e4-8ab6-e672fe38a360.png)

## Signin
![screen shot 2014-10-13 at 16 39 09](https://cloud.githubusercontent.com/assets/2305016/4616038/abce29b6-52ef-11e4-9e5c-498393260409.png)


# After

## Registration
![screen shot 2014-10-13 at 16 38 32](https://cloud.githubusercontent.com/assets/2305016/4616055/c1948c86-52ef-11e4-9c50-c8374dddea73.png)

## Signin
![screen shot 2014-10-13 at 16 38 22](https://cloud.githubusercontent.com/assets/2305016/4616058/caca8cce-52ef-11e4-8121-78dc700f07c8.png)