Adding items to the symbology page.

Added buttons that expand when clicked for the symbology that shows the marker id. The marker id does not currently link to the marker detail view. Also added a link to base.html for symbology.
Adding items to the symbology page.

Added buttons to the symbology template that expand to show the marker id when clicked and added links to the marker ids that link to the detail view of the marker.  Also added symbology to the base template navigation bar.
Merge remote-tracking branch 'origin/development' into development

Conflicts:
	cemeteries/templates/cemeteries/symbology.html