View upcoming events on a map of Places hosting Events

CPN asked for Events to be shown on a map to help visitors discover events of interest to them happening nearby.

This map should be filterable by:
* Event category field (Arts and Crafts, Politics, Planning etc)
* Types of Places (Disabled-friendly etc)

It should also allow users to tweak the time range shown on the map:

* Events today
* Events this week
* Events next month
* etc