Castle-Combat 0.8.1

What is Castle-Combat? It is a clone of the old arcade game Rampart. Up to four players (or more in future versions) build castle walls, place cannons inside these walls, and shoot at the walls of their enemy(s).
Strategic mind and nerves of steel are needed for surviving in this game.
If a player cannot build a complete wall around one of his castles, he loses. The last surviving player wins.
Enhancements:
- Simple single-player mode
- Conquer mode is back
- Fullscreen and Sound can be turned on/off
- Better netcode
- As always: a lot of small improvements, fixes and clean-ups.