Fix incorrect order of x, y in lat, lng

fixes #165 on github

There was a bug in #171 such that geocoding clicked locations for Philadelphia
were resolving to Antarctica because the X and Y values for the point
were flipped. Since there are no addresses in Antarctica, reverse
geocoding provided no results.
Merge pull request #178 from steventlamb/bug/165_fix_flipped_x_y_coords

Fix incorrect order of x, y in lat, lng