Map enhancements

I made a few changes to the map page. Default is much larger now. Took the "default zoom" and "hours ago" out of the form, and put in the ability to just show the paths of a given call (sent or received). Also, you can pick the time interval (most recent 30 minutes, 1 hour, 3 hours, ...). Please do me a favor and don't do a lot of "all bands, all calls, 24 hours....it's messy anyway :-).

Comments/suggestions welcome.