Modification of patch by ax.

Fix picking markers, Drupal 4.7
Thanks: geodaniel, linuxpimp, smulkey

Fixed http://drupal.org/node/71251 and a rather ugly bug that was making the gmap_location.module's location setting feature not work properly.

Fix geocoding.  Still not really right.  For it to work, the map id has to be nodemap for nodes and usermap for users.

Will fix so it can be any arbitrary map name later