Enable boolean map configuration 'switch-xy' property to swap X,Y parts of the URL.

Mainly to support ARCGIS Tile Server URL Layout which has the X,Y parts of the URL swapped around compared to the standard OSM Tile layout.

See: http://help.arcgis.com/EN/arcgisserver/10.0/apis/rest/tile.html
Add an example of using ArcGIS Server with use of the "switch-xy" property
[DOC] Mention the new maps switch-xy property.
Fix right click on a selected waypoint image starts to move it.
Enable double clicking as an optional way to control zooming in pan mode.

Double click of the left (primary) mouse will zoom in.
Double click of the right (secondary) mouse will zoom out.

Make use of a timeout function to wait and see if a double click event occurs.
If it hasn't then the timeout will action the single click request
 (to recenter the display to the clicked location).
Enable zooming in/out in jumps of 3 levels by pressing shift key at the same time with the zoom tool.