Closer conformance to PEP8
Replace geolocate_ip with location_from_ip.
Replace tz_from_coords with timezone_from_location.

Also remove the whole of the TZUpdate class since it is no longer in use.
Simplify __main__ specific block.

Most of the options were removed and replaced with -p/--print-only.
More closely conform to PEP8.
Remove httplib import.
Remove unused MissingZoneInfoFile exception.
Remove ip argument to location_from_ip.
Merge branch 'refactor'