Merge in modified Changes

Hi Mark - Please find the modified scripts in this pull request.

**get_trip_counts.py**
Modified to use the same format as London for the station_latlons.txt. Inherited from the `Lonstations` Class.

**reg1.py**
Added in the extra loop from the gist - https://gist.github.com/rustyb/4bc73f669baa84f6b350

Colin