Implement Vacation Mode

[dglassow]

Vacation mode is a critical feature to implement as no player can effectively play forever and vacation mode is necessary to maintain fleet assets while away from the game.

Enable user Options: Vacation mode setting to correctly put a player in stasis for a period (traditionally 48hr min). The following features/interactions would need to be disabled if the targeted player is in (v):

• Flight events of any kind
• Player interaction with any of their own planets/moons and associated structures as well as viewing of the galaxy.