Summary of Changes
* updates to necromancer and ranger spells
* improvements to quiver inscriptions
* many improvements to dungeon generation, especially robustness
* many improvements to testing and building the game, especially with
SDL2
* make the duration of multiple timed effects exactly the same
* allow selection for effects that used to give a random choice of
effects
* fix a bug that made radius of artifact lights too small by one
* improvements to handling in-game information on effects
* better documentation in datafiles
* debugging commands now use the Angband 4 command system
* upgrade of the NDS port to the 3DS with many improvements
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