search path to main point

This version introduces multiple enhancements:

possibility to give own address, after submit script will calculate path from given address to main point

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

Modified:   index.html
            -- Added --
                own address form
                directions panel

Modified:   css/maps.css
            -- Added --
                new element styles

Modified:   js/maps.js
            -- Added --
                handling of own address form
            -- Updated --
                initialize, changed formatting, added directions panel initialize