NPC speech library fixes
Changes from original repo

monster.kod Buy() now handles mobs that sell from inventory (Izzio,
Pacal).
Bonk fixes

No more bonking blind/dazzled players to allow them to see under some
circumstances.
Bonk can also be cast by non-DMs, for the rare occasions where a monster
or player will have the ability to cast this.
Merge branch 'npctextfixes' of https://github.com/skittles1/Meridian59_103 into build.1.0.411-req.694-br.npctextfixes-auth.skittles1
Hstone, Kocatan room formatting

Also made Heartstones non-disposable; fixed spelling errors in resources
and some debug code in Kocatan Sewers.
Up Chuk Creek graphical error fixes

Some sidedefs didn't have textures, so were showing the skybox. Raised
the ceiling in the tunnel near exit to 'first' sewer screen to prevent
players seeing skybox through the low roof.