GtfsStatisticsService has incorrect order of XY coordinates

[laidig]

#20 fixes this.

[sheldonabrown]

@landonreed I just realized I still have commit privs on this repo. Mind if I pick it up again and start accepting pull requests?

(I'm going to assume no response is permission to keep things moving along...)

[landonreed]

@sheldonabrown, not at all. Please go right ahead :)