Single post in PokéWalker bugfix/update

Couple of minor follow-ups: - I've updated everyone's historical data to account for this bugfix. All historical distances travelled have been scaled by 6371/3671 to reflect the corrected calculation. This should be shown on the Stats page within an hour or two. - The Walker has been updated to version v1.1 -- please ensure your Walker shows this version number on the About screen (right-most menu item) to ensure it sends the correct data to the server - invalid data may be rejected leading to distance not being counted.