Make some weaker artifact weapons more interesting (from Sporkhack)

All the listed weapons have a 20% instakill chance against their
respective target monsters, plus:
- Dragonbane is now a dwarvish spear that conveys fire, cold, shock, acid,
  poison, acid, and disintegration resistance while wielded.
- Giantslayer is now a sling that gives 18/** STR while wielded or
  in the alternate weapon slot.
- Werebane conveys polymorph control while wielded.
- Ogresmasher gives 25 CON while wielded.
- Trollsbane prevents trolls from leaving corpses while wielded.



git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1441 f1e491ac-5ded-4967-80bf-9f4855be876a
Weeping angel overhaul:

Weeping angels do not appear in Sheol.
Weeping archangels -- faster, stronger weeping angels -- appear only in Sheol.
Weeping (arch)angel damage distribution has been adjusted.
Weeping (arch)angels cannot move if the player can see them, although they can still use their melee and gaze attacks.
Weeping (arch)angels using their gaze attack on each other are turned to stone.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1442 f1e491ac-5ded-4967-80bf-9f4855be876a
Only seven weeping archangels exist.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1443 f1e491ac-5ded-4967-80bf-9f4855be876a
Colour adjustments for certain monsters:

Arch-liches, master mind flayers, and weeping archangels are bright magenta (idea by Adeon).
Cthulhu is bright green, both to appear different from mind flayers, and to match the source mythology (idea from UnNetHackPlus).

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1444 f1e491ac-5ded-4967-80bf-9f4855be876a
Removed weeping angel themed big room.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1445 f1e491ac-5ded-4967-80bf-9f4855be876a
Weeping angels and archangels have a one-in-three chance of carrying a potion of blindness; weeping archangels have an additional one-in-three chance of carrying a wand of lightning.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1446 f1e491ac-5ded-4967-80bf-9f4855be876a
Certain messages regarding weeping (arch)angels now make more sense, particularly where their unique gaze attacks are concerned. Also fixed some inconsistencies in applying blank spellbooks and the Book of the Dead.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1447 f1e491ac-5ded-4967-80bf-9f4855be876a
Make gazemm() more simple and closer to its original flow.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1448 f1e491ac-5ded-4967-80bf-9f4855be876a
Minor code fix to avoid a possibly nonsensical message. (How can you know what the weeping angel is doing if you can only see the monster it's attacking?)

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1449 f1e491ac-5ded-4967-80bf-9f4855be876a
Tourists start with more darts to compensate for more training being needed to advance weapon skills.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1450 f1e491ac-5ded-4967-80bf-9f4855be876a
Mark skills in the #enhance menu with '>' if they require 'just a little' more exercise before they can be advanced

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1451 f1e491ac-5ded-4967-80bf-9f4855be876a
Update the ChangeLog with my last two changes

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1452 f1e491ac-5ded-4967-80bf-9f4855be876a
Additional hallucinatory monsters (from #unnethack).

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1453 f1e491ac-5ded-4967-80bf-9f4855be876a
Various minor changes from UnNetHackPlus:

Player can wish for up to 100 projectiles.
Land mines and beartraps weigh less.
Message added to explain why player cannot engulf a huge monster.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1454 f1e491ac-5ded-4967-80bf-9f4855be876a
Various monster colour adjustments (from UnNetHackPlus):

Mind flayers and master mind flayers are bright magenta, to differentiate them from dwarf lords.
Aleax are orange, to differentiate them from ki-rin.
Were-critters are magenta in animal form.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1455 f1e491ac-5ded-4967-80bf-9f4855be876a
Grammatical enhancement for weeping angel attacks.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1456 f1e491ac-5ded-4967-80bf-9f4855be876a
Further grammatical enhancement for weeping angel attacks; restore AT_CLAW now that the message for observed attacking makes sense.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1457 f1e491ac-5ded-4967-80bf-9f4855be876a
lev_comp: Allow humidity flags when using a random coordinate.

For example: OBJECT:'?', random[solid,wet]



git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1458 f1e491ac-5ded-4967-80bf-9f4855be876a
Destroying iron bars in sokoban is cheating, and monsters (mostly) won't do it for you

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1459 f1e491ac-5ded-4967-80bf-9f4855be876a
Word of Recall scrolls are cursed scrolls of teleportation.

git-svn-id: https://unnethack.svn.sourceforge.net/svnroot/unnethack/trunk@1460 f1e491ac-5ded-4967-80bf-9f4855be876a