Responsive controls and margins for map

Screenshot below, pretty small changes. One thing I struggled with for way to long was setting the default zoom. Google maps API has a map option `zoom` which is meant to set the default (from 0 to 19) but it literally had no effect (similar experience to the opacity property for the markers). I left it as is for now rather than set the min zoom to 0 and have huge grey bars on portrait mode tablets and phones. Ideas / suggestions welcome!! 

![deployments map foundation for learning equality - google chrome_024](https://cloud.githubusercontent.com/assets/1319950/3515811/4c31a03a-06d9-11e4-8e88-2a9fe371dd3f.png)