- Implemented back end script for generating CSS maps. ...

- Made code more consistent across all versions.
- Finished CSS map timing code.
- Changed all .html => .php.
- Made styling of all web pages more consistent.
- Included lat/long in hash key for all cities (not just unknown) because
  there may be several different lat/long combinations that map to the same
  city name.

- Added initial code for CSS map version.