Liberal Crime Squad Code

- Secret Service, Politician creature types
- Persistent President character, can be found in the Oval Office of the white house (much of the behavior around the President is still incomplete; news doesn't react to stuff involving the President, kidnapping/converting/seducing has no effect on the game, and his/her death will result in VP succession on the agenda screen)
- Updated White House maps and added as a raidable location
- Added cost for intercity travel
- Added ability to travel to distant locations as one-shot raids to single city mode
- Restored Commercial District for single city mode
- Slight code cleanup and refactoring in date.cpp; moderate restructuring of news.cpp