* Introduced AIL_positionwander()

* Just selects random places to go for now...
* Extended AIL_positionwander.
* Introduced AIL_findweapons()
* [LUA IA] Fixed and improved the team visibilty check.
* [AI] The actor's current position might also be a valid position for hiding.
* Fix mock shots with g_nodamdge.

* It beats the purpose of g_nodamage if the RF and AI functions know they
  aren't dealing any damage...
* Fixed inverse team visibility rules.

* Now the AI might start hiding again...
* Minor fix in G_GetImpactDirection()
* Fixed bug #5364 (Zero-weight armor after revitalising)
* Fixed bug #5317 (Shot hits when fired over friend in diagonal square)