Remove score changed, add some comments

Remove method scoreChanged from Team, TeamListener, ClientsPanel. Also add some comments to Main and Dispatcher.
Remove team passwords

Remove team passwords from Team, TeamDatabase and Dispatcher.
Remove team passwords

Remove team passwords from Team, TeamDatabase, Agent and Message.
Remove team passwords

Remove team passwords from Reaper, Human Agent, Sample Agent, Membership and Agent.
Remove remaining flags code

Removed some left-over code for flags under HumanAgent, Agent, SwingView.
Replace gameplay with simulation

Replace gameplay in game.md, test.game and Game.
Replace "game" with "simulation"

Replace game with simulation in all files, where it appeard. Also replace Game with Simulation. Rename Game.java to Simulation.java and GameListener.java to SimulationListener.java. Instead of a game-file now there is a simulation file stored in ".sim" instead of ".game".
Change test.sim map and remove flags params

Change map in test.sim and remove parameters for flags. Same with simulation.md.
Drop Agent Reaper and further removal of flags..

Remove flags from UI.