New Playerhouse system

[Admins]

Yesterday all playerhouses have been updated
to a new script version. Main features:
- automatic rent system (say show rent/pay rent)
- all keys have a number so you can use it for assigning
ownership to special rooms (and it works after npcserver
restart since the keys are saved in the house-control npc)
- a new class for playerhouse doors which makes the
thing simplier, the script looks like this:

NPC Code:

---

if (created) {

  this.key = 4;

  setstring this.control,House-Control1;

  this.warpx = 8;

  this.warpy = 13;

}

join housedoors;

---

- new command: 'give ownership to "accountname"'

Because the rent thing is simplier now (because it doesn't
need admins to transfer the money etc.) we can add more
houses, possibly in the underground lake