visitorinfo 6.x-1.3

* Expanded help to include new functionality.
* #668474 Comment #3: Changed menu path to visitorinfo-map. This menu item
can be placed into any block or other menu listing.
* Changed menu access arguments to 'access content'.
* #668474 Comment #3: Implemented hook_theme() and registered 'visitorinfo_map'.
* #664500 Comment #14: Moved most of the JavaScript out into it's own
initialization function. Scoped variables to avoid collisions.
* Switched the flow of code to allow easier theming of the map.
* Added a new Visitor map block.
* Added code to remove records from the database with no information.