Updated bootstrap version.
Minor style changes.
#94985: Added loading indicator for requests.
#94985: Added support for changing the filter composition mode from intersection to union, and changed the way the tools dropdowns are shown in the navbar, to better match the initial mockups. Also, added a stub for the "clear all filters" button.
Merge changes from upstream.
Merge branch '94985-FilterCompositionModeSelector' of github.com:luisromangz/google-gis-demo into luisromangz-94985-FilterCompositionModeSelector

Conflicts:
	src/geofence.html
	src/walking_distance.html
Merge branch 'master' of github.com:Emergya/google-gis-demo

Conflicts:
	bower_components/bootstrap/.bower.json
	src/geofence.html
	src/walking_distance.html