Migrate the London places from @SamirTalwar's map.

Link to original map:
https://mapsengine.google.com/map/u/0/edit?mid=zvTlbISowlKc.kOUK20lPcYHs
Added types, and addresses and opening hours from Google.
Flip the latitude and longitude.

I accidentally imported these wrongly, because KML uses the format
`<longitude>,<latitude>,<altitude>`, and I assumed the first two were
reversed.
Merge pull request #56 from SamirTalwar/master

Migrate London to the real deal from Google Maps.