With an optional parameter for the page to check the number of votes for.
Partially copied from the {{NUMBEROFVOTES}} and Comments'
{{NUMBEROFCOMMENTSPAGE}}
Change-Id: Ia19f63fe5894a407ad5826720199b9e24d141951
Update $wgExtensionCredits here and there, renamed descriptionmsg key for UKGeocodingForMaps.
Remove a few globals that were used for magic words.
Trim trailing whitespace and update indentation in a few places.
Updated examples.