Custom open/close events for Info Window component

• options to set custom open/close events for Info Windows attached to Markers;
• if open and close window is the same (e.g. 'click'), then Info Window visibility is being toggled by this event;
• available events: click, dblclick, rightclick, mouseover, mouseout;
• default behaviour is to show Info Window on "click" on Marker and hide only by click on close button on Info Window.

Travel mode, Info Window options, explicit protocol setting

• Info Window options;
• Travel mode support for g-map-route;
• Option to set protocol explicitly for google maps lib.

Location Change Hook and Label Support

• label support for g-map-marker;
• onLocationChange action for g-map-address-marker.