[Talk-transit] London bus routes update

[wynndale at lavabit.com]

I’ve put every bus route relation I could find in London into the London
bus routes project page
(http://wiki.openstreetmap.org/wiki/London_bus_routes). Many of them are
obviously a lot shorter than they should be; is it more useful to get a
‘foot in the door’ with more routes and work on fine-tuning the tagging or
to complete the relations we’ve already started?