PlanetsCentral

• file I/O finally works as it should.
• marker manipulation.
• more user interface automation.

Items introduced in this version:

• ChangeFleetLeader
• Delete
• FleetScreen
• IsNum
• IsString
• SetColor
• SetComment
• SetFleetName
• UI.GotoChart
• UI.GotoScreen
• UI.Screen
• UI.X