[MPDX-163] add contacts map

![contacts_-_mpdx](https://cloud.githubusercontent.com/assets/1080613/4429586/9adeeeaa-45f3-11e4-93cf-d1be7a7582ad.png)
Uses the filtered contacts and Smarty Streets geocoding.

I would like to roll this out as tester feature to test how it handles 400+ contacts.
This could be a place to add condition for the rollout to testers, something like:

```   
<% if $rollout.active?(:contacts_map, current_account_list) %>
   <a href="#" ng-click="mapContacts()" class="btn">Map These Contacts</a>
<% end %>
```

And then the feature is activated by running `$rollout.activate_group(:contacts_map, :testers)` in the `rails console`