sector fees

Added in a function that takes money from all factions that own sectors
hourly (700,000 credits per sector per day by default). If the faction
runs out of money (goes into -ve credits) they are given a buffer of
effectively 48 hours worth of fees (1.4 mil per sector by default). If
they dont keep their money above this then they will begin to lose
sectors at the rate of 1 sector per hour (once they start losing sectors
it becomes harder for them to stay afloat, because to prevent them from
losing more sectors they myst pay back enough to cover the loss of the
buffer as they have lost a sector)
when they go into the red, they receive a faction mail informing them
they have 48 hours, and they get a message for each sector they lose.
Also, the sectoral claim beacon is attempted to be despawned, but It may
not be sucessful