Add Ragged Shorts to item_db.
Add Ragged Shorts to the tutorial.

It's now given together with the Cotton Shirt so new characters won't
have to run around in underwear.
Disable Christmas event scripts and remove Christmas tree from Nivalis.
Remove and delete QUEST_clothdyer_state since it isn't used anywhere.

Remove it from Selim's script.
Add it to clear_vars function.
Katze quest: some punctuation fixes in menus.
Katze quest: subtract 30% of health instead of fixed number when scratched by the cat.
Katze quest: remove player variable KatzeBeenOutside

Use temporary player variable @KatzeNeedsAlone instead with inverted logic.
Add nosaveflag to Katze's cave, so when the variable is reset, you're actually
outside of the cave.
Add KatzeBeenOutside to clear_vars.
Katze quest: use bitmasking to be able to remove the variable LastHiss.

Nibble 0: Progress of quest
Nibble 1: what was saved previously in LastHiss
Add LastHiss to clear_vars

Since the value in LastHiss is only needed to get some hint from Alice,
taking over the value from LastHiss to Nibble 1 of Katze isn't needed.
debug messages