Issue 18: Support modal dialogs with player
Project Member Reported by johnamag...@gmail.com, Jan 8, 2012
The server should be able to manage a modal dialog with a player.

Example 1:
 1. Player connects to server
 2. Server enters modal dialog for login
 3. Server prompts player for login name
 4. Player enters `abc123`
 5. Server continues with player as abc123