* Create the player on a random staircase on entering a level.
* Change existing stairs around when a quest is finished.
* Give each dungeon square a remembered feature, and use it to avoid displaying
  anything when a monster bores through a wall.
* Add the ability to record a keymap with the game giving feedback.
* Display messages from previous turns in a darker colour.
* Delete the character under the cursor when delete is pressed in text prompts.
* Only update the "object recall" when manipulating spellbooks.
* Describe what effects skill restoration will have on the I screen.
* Remove the unused second spellcasting frequency from monsters.
* Fix the following bugs:
  * player_has_flag() may have given unreliable results.
  * The redraw prefs help command displayed the wrong text.
  * Restoring wisdom did not recalculate the chi total.
  * The track_mouse option could reveal the identities of unidentified things.
  * Aborting at the "choose stat set" screen could crash the game.
  * The shop restoration help identified mushrooms of restoration.
  * The game could identify some aspects of random artefacts without cause.
  * The game identified object activations without cause.
  * Proportional fonts were laid out incorrectly with -mx11.
  * Z lines in the pref file gave a false error message on successful parsing.
  * Referring to the macro for $ in the macro prefs could have bad effects.
  * The game could give special feelings for more boring levels.
  * The probabilities on the extra character info screen could be above 100%.
  * The wild map didn't all fit on the screen.
  * The player and monsters could be hit twice by a spell effect.
  * Allies were duplicated on the surface.
  * Monsters created during the player's turn could act immediately.
  * Dimension door failed under inappropriate circumstances.
  * rand_int() never returned a value above 65535 on some systems.
  * rand_int() could hang if u32b was not a 32 bit type.