enabled multivalued bbox support fixes #17

Fixes #17 

Enabling multiValued bounding box support via the Solr4 location_rpt field type.

Note, two bounding box locations can be seen Korea, Seoul and South Korea for the same document.

![screen shot 2014-03-20 at 6 23 21 pm](https://f.cloud.github.com/assets/1656824/2479427/71e475d4-b097-11e3-83fb-27b505d53969.png)