Revert "Don't generate Sniper."

This reverts commit 345611fe4c33ec475874eb58a659e94e7118649a.
Revert "Remove the Polymorph spell"

This reverts commit de3bacb8c123a86127c12d7a76ed6176653bbb02.
Revert "Likewise, remove orc slaying."

This reverts commit 4dbb6ee0fb53a618cd167095707a95124fda71ea.
Revert "Remove reaching from weapons when upgrading saves; misc cleanup."

This reverts commit 6d63218842fccde0660e653fe8f6bc7e066f778f.
Revert "Remove Song of Shielding"

This reverts commit 118bf1a1ac04a081ec9e3823a9ecb5a19127b8c5.
Revert "Don't place additional webs over time in Spider"

This reverts commit b0ee51420f310e463707fb4fb6c2b0f9e11b8eee.
Revert "Always identify wands on zap"

This reverts commit c7ef5b85fb05ef13598df80dda79916cf4ec28bc.
Revert "Remove the reaching brand"

This reverts commit c72be133eeb0bc13f3a316be0a8388f9b8fc3cea.
Revert "Remove rock worms from monster Summon Vermin"

This reverts commit dd890a18065a11cbb4c182f4a24f8671f07e36c9.
Revert "Remove some trapped loot vaults"

This reverts commit fbf0dc1ee176df95d9b9908de049d14cae6f1fa9.
Revert "Don't produce animal skins outside starting gear and acquirement."

This reverts commit 09e2829bc6e0143a93ed5ed21f102a332ff09423.
Revert "Remove a trap vault"

This reverts commit aef027da4589b242accc752d4c14ba5c478bf624.
Revert "Make ground item destruction an unthing."

This reverts commit 4c7f5a82f8af4e99f729d4f227c546bd23d2bf41.
Revert "Solidify Lava Orc speed"

This reverts commit 3775fc1cf22e09ba99216a5e2db972ed46364d6a.
Revert "Cull young'uns from the list of "ancient artifact" book authors."

This reverts commit 78dfbdf27cefa566209763415876fcb08f40d0a5.
Revert "Purge a bunch of unused tiles and descs."

This reverts commit a98f0842a671faaad92e9821ab3c7c21d8aa866b.
Revert "Make Summon Twister an unspell."

This reverts commit a121aec9f2f58327f380504393e5d92675b734f3.
Revert "Collect away chaos butterflies."

This reverts commit ae75991e10bf063bd4f00d99099d144163a3e500.
Revert "Always identify evokable artefact properties on equip"

This reverts commit b1eef20fda172d3ea5e8f90c7b770f2d346637dd.
Revert "Get rid of traps in a number of vaults."

This reverts commit 11c248451e2392f93de405dfe692c31ff6ff4338.