new t-shirts
class of object for farlook during hallucination is also bogus (idea from dnethack)
more random engravings
more bogus things
reworking list of randown engravings
Merge branch 'refs/heads/engravings'
Don't say "you climb up/down the ladder"

Idea from https://github.com/tung/NitroHack/commit/70558aa943b370d3d8e608c317cdce8664159449
refactor hurtle_step
remove disliked YANIs from comment
set stunned if we hit something during hurtling
scrap badly disabled code used by scroll of amnesia
remake losespells()

remove effect of confusion, document effects and refactor
I dislike this YANI
rename functions

add_weapon_skill to add_skill_slot
lose_weapon_skill to lose_skill_slot
refactoring
rename "weapon_slots" to "unused_skill_slots"
add comment
move part of code from lose_skill_slot to lose_skill
add forget_skills
rename losespells to forget_spells