altered views table to include center point and map type id. Need to add zoom level, write tests, and create some SQL & DDL for alter table code.
Added Presentations and Presentation Tests to the data API.
Merge remote-tracking branch 'origin/master' into presentations

Conflicts:
	apps/site/api/serializers/view_serializer.py
	apps/templates/includes/menus/map_toolbar.html
	static/scripts/map/viewer.js