Changelog through 0.13-a0-3092-g1832de8.

I'm poring through over 1700 commits when making this update, so I'm
certain things are going to get missed. Please fix things up as
necessary.
Make misc item glyphs distinct (simm, dpeg).

We have fourteen misc items that appear in the normal game (the quad
damage doesn't count for this) and fourteen colours to pick from, so
it's just a matter of picking what goes with what. I went with:

BLUE         - lantern of shadows (was LIGHTGREY)
GREEN        - plain deck (was 25% of LIGHTBLUE, GREEN, CYAN, RED)
CYAN         - fan of gales (was LIGHTGREY)
RED          - bottled efreet (was BROWN)
MAGENTA      - ornate deck (was 50% of MAGENTA or BROWN)
BROWN        - stone of tremors (unchanged)
LIGHTGRAY    - disc of storms (unchanged)
LIGHTBLUE    - phial of floods (was CYAN)
LIGHTGREEN   - box of beasts (was BLUE)
LIGHTCYAN    - crystal ball of energy (was LIGHTGREY)
LIGHTRED     - horn of Geryon (was LIGHTGREY)
LIGHTMAGENTA - legendary deck (unchanged)
YELLOW       - lamp of fire (unchanged)
WHITE        - sack of spiders (unchanged)

Feel free to bikeshed further about this.
Manuals always get a white glyph (dpeg).

Regular books can no longer get a white glyph as a consequence.

Console players can now see if a book is a manual at a quick glance.
Reduce the number of monsters a Zot trap can recall.

It's now 2-4, down from 3-7.

Convokers still convoke 3-7.