New version 4.0 us up:
Damage script can now alter zombie transformation chance.
Add access to current difficulty level in scripts.
Add base function requirmets to buy items, crafts and solders.
Add access to geoscape soldier in scripts.
Add script that is run at end of mission.
Add arcing shoots per attack type (by ohartenstein23).
Breaking change: Renamed `action` to `battle_action` in reaction scripts.
Add battle action to `awardExperience` script.
Breaking change: Renamed access function to statis in armor (added prefix `Stats.`).
Custom hangar types and script on item will be available in next version (4.1 or 4.2) probably with script run on item equip.
In this version probably most important change is that script now can escape one battlescape and transfer state between battles.
As side effect you now can override how much wound days unit will have, image that only thinking about on some eldar gods you will need take some weeks for off. Another is your super duper solder will not take year to heal half of his hp.