Implemented a work around using (the existing msql code) for handling Spatialite not being able to do '.distance(...)' query operations on SRID 4236 - ValueError: SQLite does not support linear distance calculations on geodetic coordinate systems. See more info about issue here:  https://github.com/coderholic/django-cities/issues/49. Also updated '.gitignore' to skip the 'cities/data' and '.DAV' folders.
Merge pull request #50 from danielsokolowski/master

Data import work around fix for Spatialite lack of '.distance(...)' support.