*v0.2.0

• basic game functionality: no observers, no cheat-check
• single-threaded
• text-mode
• hot-seat

*v0.4.0

• cli interface (using ncurses)
• full game functionality
• hot-seat

*v0.6.0

• multithreaded
• networked

*v0.8.0

• ai

*v1.0.0

• gtk interface
• security