[#363] Remove country display code
[#363] Change the way collectionDate display is handled
[#363] Change name to firstSurveyedLocaleId

* This field is used to capture the first placemark that goes in to a cluster. If the cluster ends up with a count of 1, we need to be able to display it as a single placemark in the dashboard, and therefore need to know which placemark it corresponds to.
[#363] Handle no surveyal values available case
[#363] Placemark graphics design changes
[#363] Small fixes

* reduce number of generated test data
* change comment text
* use query instead of find to access data store
[#363] Clean cache before recomputing localeClusters
[#363] Add SurveyedLocale datastore indexes