Opt-out map in home page of bootcamps

Someone suggest to me that the home page have one map showing the location. This PR adds Google Maps in the home page (something is broken with [openlayers](http://www.openlayers.org/dev/examples/markers.html) when I try using it to add Open Street Maps).

**Note**: The maps isn't visible yet due CSS configuration, if you disable `position: relative;` in `#map-canvas` you will see the map at the top of the page. **I need help to solve this CSS issue**.