Changes:

• FEATURE: new setting <zoom><grid_click_enabled>
    If set to true clicks anywhere on zoom control's grid will zoom
    to that level rather then register as click on a map simmilar
    to Google Maps (this is the default behavior from now on)
• FEATURE: if <line> has "hover_color" property it will now generate
    rollover and click events like movies/areas and will invoke
    amRegisterHover(map_id, oid) and amRegisterClick(map_id, oid)
    JavaScript functions respectively.
• BUG FIX: timeline now correctly passes "map_id" parameter to
    amMap which in turn correctly returns it with event functions.