Planet admins and new commands

[Admins]

We have added several new commands for the Events Team to hire new events team members, and they can also hire planet admins:

- admin for only a single planet
- can use only the commands for that planet
- can kick and unstick players from that planet

This should make the events team more active

The planets are now also automatically reset when the events team members and planet admins logout, so that you can again use all weapons and the time for guild wars and deathmatch are correct.