* Introduced AIL_weapontype()
* Make AIL_TU return usable TUs instead of total TUs.
* Adjusted AIL_wayupoints()
* Added a brief reference of the lua AI bindings.
* Share AI_CheckPosition() with the LUA AI.
* Make the LUA AI mind hurt triggers.
* Pass AI_CheckPosition() the position to chack.

* To allow checking a positon without changing the actor's origin.
* Make the LUA AI mind hurt triggers more.
* ui lua integration

* fix the issue that buttons are drawn disabled if there is no
* onClick event handler; now the button "disabled" state only controls
* this
* Introduced AIL_actor()
* Renamed AIL_getweapon() to AIL_grabweapon()
* ui lua integration: a working calculator using lua

* demonstration of ui lua integration
* test_lua.ufo contains a working calculator created using
* lua
Merge branch 'master' of git://github.com/ufoai/ufoai