* Allow the charges of objects in slots to be drained.
* Allow inscriptions such as @^A1 to be interpreted correctly.
* Allow text to be copied directly from/to the game in the X11 port.
* Give information about the square under the mouse cursor in the X11 port.
* Give the unique cats distinctive colours.
* Give meaningful error messages for some errors which cause beeps.
* Give an error message if the "enter pref line" command is not parsed.
* Remove confusing age references from the docs.
* Omit help text for some options which don't exist as compiled.
* Add code to check for some bugs in the options table during initialisation.
* Fix the following bugs:
  * Barbarians could not be selected from the "pick a race" screen.
  * Branding, but not enchanting, ammunition did not rearrange the pack.
  * Keymap dumps were the wrong way around.
  * Some potions could not be created directly in debug mode.
  * Bad rings/amulets could sometimes gain a positive pval, etc..
  * Macintosh-style text files were not read correctly by the game.
  * Some format strings could return nonsense.
  * Monster speed boosts were calculated the wrong way around.
  * Reflected attacks always went down and to the right.
  * Cone-shaped attacks never caused the stated amount of damage.
  * Martial arts AC was only modified when the player stopped being encumbered.
  * The game used the keymap of a keymap to see where the player was moving to.
  * +, - and the number keys in roguelike mode did not work correctly.
  * Bones files were not saved correctly.
  * It was possible to overflow player_name and a macro buffer.
* Clean up some code.