Allow building with diagnostics but not mid annotations.

DEBUG_MONINDEX is now turned on by FULLDEBUG but not by DEBUG_DIAGNOSTICS
alone.
Add a parallel enum/array comment.
Add a &^Q category for noise messages.

Not just DEBUG_NOISE_PROPAGATION, but also "alterting" and "disturbing"
messages.
Add a &^Q category for skill training messages.
Put another message under DIAG_COMBAT.
Put several more messages under DIAG_ABYSS.

Everything in abyss.cc except for "Placing N corruption seeds".
Improve wording.
Changelog through 0.16-a0-942-g1b4356f
Add overlooked changelog stuff (mostly pre-Ru)
Display monster MR as a bar
Display AC and EV bars in monster descriptions
Actually, don't ignore phase shift when displaying mons EV
Simplify cleaving

It now (attempts to) hit everything around the attacker, rather
than being blocked by walls. The previous behavior was unintuitive
and unnecessary; it was designed to discourage fighting in e.g.
corridors with enemies on both sides, which is not something
which needs further discouragement!

this is also very helpful for when the lernaean hydra becomes
playable
Give Dragon's Call the empowered colour when in Dragon Form.
Simplify.
Experimental Xom effects on hit: Harmless clouds, butterflies.

They only happen on high-damage attacks, and I hope are not too common,
or too similar to the other gods they're copied from (though the deviwiki
had the cloud suggestion long before Dithmenos was added!).
New Xom effects: good scroll of fog (Xom-stlye), bad chaos cloud.
Don't crash when doing a Xom debug session.

This has apparently been broken for a quite a long time. I also
changed it to overwrite the previous contents of the file rather than
appending, since that did seem more useful.
Allow Xom to repel stairs in the Abyss even with no tension.

In the Abyss, the time trying to get into the shifted stair might matter.
And given the amount of work people put into finding exits, it should
be hilarious enough for Xom and the player to both laugh.
Display what you can cycle through on the bottom row in the ^ screen.

To simplify code, Xom gets the wrath screen as well, which seemed
consistent with Ru. PleasingFungus suggested that we look at both of
them later and get rid of the screen for both soon, though.