Handles layout/building up of features within the slots.
Handles anything relating to layout (mainly the Backbone/SlotPath objects).
Handles the calculation of when to switch resolutions based upon the current scale.
Divide map up into sections, and manage/display each section individually.
Used to manage any style events, and handle swapping of style objects.
This class receives zoom events from the backbone, determines if they would result in a context switch or not and distributes the appropriate events to any listeners.