Setting unique ID for countries group
Simplifying property calls
Adding ids to increase granularity
Switching node selection to by ID
Isolating method used to draw markers
Switching marker draw to event-based execution
Add the ability to stop rotation
Added check to make sure map is rendered

Check to make sure the map is rendered before we try to draw the
location markers - if it's not, render it.
Adding case-insensitivity to marker properties.