Implement server command line

[GrumpyOet]

Ad command to the console like:

• mass (give a player some mass by using his ID)
• kill (Kill a player by using his ID)
• playerlist (shows the player IDs)
• takemass (take some mass of a player by using his ID)
• help (show all the commands)

if you type anything thats not a command the show this message shows up:

• This is not a Command. Type 'help' for help

[iiegor]

Probably this will be introduced when all the basic functionality is done. I will keep this open ;)