Arguably improve new monspell descriptions
Trim out some obsolete breath weapon code
Fix tiles compilation
Clean up some unused mon-abil includes
Move some flay ending code from mon-abil.cc to mon-death.cc.
Remove a block of (apparently) unused code.

The comment suggested handling it earlier, but that seems to be exactly
what handle_mon_spell does.
Move moth of wrath/queen bee berserking out of mon-abil.

It would be nice to make it use a beam, so that it could use the database
for the casting message, and that might duplicate less code. However,
I'm not sure how to best do so without changing behavior; for example, LOF
is not currently needed for it.
Move phantasmal warrior abil blink close to a spell slot (wheals).

... which I was planning on doing anyway, but wheals reminded me of it.