Added event_map short code
Added event_map short code

Added event_map short code and usage on sample event.
Short code will pull event lat+lon and location string
from the event YAML file to generate a map.


Former-commit-id: 72cd35a29b82280a232c90dd5be26446a096dd10
gomex/devopsdays-web,gomex/devopsdays-web,gomex/devopsdays-web,gomex/devopsdays-web