Add URL for getting google directions

This adds a link that uses the address of the center and the user's
current location to provide a link to google maps' directions
Merge remote-tracking branch 'upstream/staging' into origin-topic-add-directions

Conflicts:
	python/ecep/portal/static/js/cel/templates/locationList.html
Merge pull request #223 from notthatbreezy/topic/add-directions

Topic/add directions