Remove extra message when looting empty bag of tricks

This removes the "nothing happens" message, making bags of tricks less
annoying to use as an alternative to sacks.
CS1379: Empty bag of tricks don't get destroyed by wands of cancellation

I mentioned this on the NetHack wiki, and bhaak confirmed that it was a
bug and fixed it, and this is that fix.
Remove stone res. from corpse-conveyed resistances

This was never implemented and arguably shouldn't be.

From UnNetHackPlus, credit to Bulwersator.
Show monster type info with '/' (UnNetHackPlus)

Monster details such as speed, base AC, resistances and attacks can be
viewed using the '/' command, either by entering its name or targeting
it with the cursor with (semi)colon.  It accounts for things like hidden
Riders and unknown randomized dragons.  It has the ability to show
database/encyclopedia info in the same screen, but no text for monsters
has been written yet.

Compared to UnNetHackPlus, this functionality exists with the whatis
command rather than the far-look command.

From UnNetHackPlus, credit to Bulwersator.  Word wrapping code from
NetHack4, credit to Jared Minch.
Update readme for new monster descriptions and auto msg resizing

Automatic msgheight means the game does The Right Thing and thus is no
longer needed in the readme.

The new monster description feature is a game changer, so put it where
people will notice it.
CS1424: Remove 2/3 chance to defer Fort Ludios portal to later level

The portal will now appear in the first vault generated past level 10,
although it still has a chance of not appearing if none are present.
Allow stacked display elements for database lookup

When using '/' to look up a monster standing on an object in a trap,
allow the player to choose one to search the database for extra info.
This allows players to view detailed descriptions for monsters that
happen to be standing on top of things.
Don't highlight object piles under monsters

This is meant to go with commit 1fce1fb44f (inverse instead of blue bg
for piles).
Remove 'blink' interface option

It was ugly, distracting and nobody will miss it.
Allow probing to identify randomized dragons

Probing a (baby) randomized dragon (e.g. with the wand or Magicbane)
will formally identify its scales and scale mail, as will zapping a wand
of probing at yourself or quaffing a potion of enlightenment while
polymorphed into one.  This should make wands of probing more useful.