Update command texts wrt the engine
Tweak shallow level content
Make potions and flasks rarer
Fix the effect of nullifying poisons, etc.
Shorten Shrapnel to Blast
Give some actors the skill to lob Fragile items
Add activate skill to some actors, to read scrolls
Make aliens weaker, because they can gear up
Some content tweaks to give humans a fighting chance
Make darts identified, to let AI use them early
Make special effect weapons 3 times rarer
Make the defence game mode really the opposite of campaign
Fix multiple AddSkills per actor definition