MetacatUI

When you input a bad API key, the UI loads, but you get an alert saying that Google Maps is not available and the map does not render. This seems to be fine, but I wonder what will happen when we start trying to place markers -- best to surround those methods with good error checking. If we don't have a map, don't even bother with the spatial calculations and plotting overhead.

Now falling back gracefully when either Google maps or the reCaptcha libraries cannot load. The UI will still run (without support for those areas that failed to load, of course).