updates for wider map

* width is now 900px up from 650px
* extra space allowed for wider address search box
* space for the 'find me' button for automatic geolocation, that is now next to the search box

![screen shot 2014-05-12 at 5 32 00 pm](https://cloud.githubusercontent.com/assets/919583/2951289/818d944a-da25-11e3-92a5-b763c7631d4d.png)