Secure map & improve parking directions

Map no longer includes contact email addresses (or other fields not intended for display) 

Parking directions are now more accurate and helpful.

As a bonus, also including custom template tag from KA Lite codebase that can handle dicts as well as querysets. 

Wooooo!

Oh and here is a screenshot of the directions page 

![selection_066](https://cloud.githubusercontent.com/assets/1319950/4142141/b3dfa016-33b5-11e4-9bce-cd9a37b5d7d1.png)