find areas list

This version introduces multiple enhancements:

added list of areas to search given address
automatically show point with area main point

Details of additions/deletions below:
--------------------------------------------------------------

Added:      js/areas.js
            -- Added --
                example area

Modified:   index.html
            -- Added --
                loading of areas to search

Modified:   js/maps.js
            -- Updated --
                search point submit to search in given area
                initialize to show up all areas