index-*.html: Enable inclusion of oms.min.js
Makefile: Generate index-cdn.html from index-local.html
js/oms.min.js: Updated to latest release.
js/mappit.js:
- Added OverlappingMarkerSpiderfier to manage markers.
- Moved click event from individual markers to oms object.
- New property currentInfoWindow to track which info window is open.
- Dropped unused properties psAd, psName, psLatLng, directionsDisplay, directionsService.
Additional changes missed in last commit.