Protected start base

[Admins]

Right now there is a lot of base laming - people camping at the enemy base and killing everyone who arives. You have around 5 seconds after warping in which you cannot be killed, but it's apparently not enough. It's especially bad for new people who get killed right away without a chance to defend themself or at least trying out some weapons.

Proposed change:
- protect people for one minute after entering the map
- the protection goes away if you leave your own base
- when you go back to your own base then you will not be protected, so you cannot use it for laming