Edit: Evil Obelisk 018-3 and Function Evil Obelisk

* Changed monster to areamonster, monsters will now spawn in an area defined
* adapted logic
* decreased costs
run 'make maps' for client-data changes.

update submodule pointer.
Make make news dep on news.d's timestamp, not just splat
update submodule pointer for 015-1
run 'make maps' for client-data changes.

update submodule pointer for client-data.
Add news entry about the upcoming release.
Really fix the random spawn points bug
Fix Nivalis menhir to behave like the others.
Rewrite news.php

* Refactor stuff into functions.
* Bump min Mana version to 0.5.1.
* Detect old ManaPlus versions also.
* Give a 403 Forbidden error to old clients (still sends the body).
ammending Game Rules