Remove location submit field from /people, remove un-used html tags on search_people.html

When users try to search people based on location, the results are always zero. There are no results for location-based people search. That is because the geo-location feature has been removed and is no longer supported. This PR removes the location box from the /people/ page to avoid this confusion. 

BEFORE:
![people_search_before](https://cloud.githubusercontent.com/assets/954858/5356026/9272b204-7f4d-11e4-9081-3f0c52295086.png)

AFTER:
![people_new](https://cloud.githubusercontent.com/assets/954858/5356033/a1559b56-7f4d-11e4-99e2-cc1f464511c3.png)