Game:

- Removed traps and related skills. (Thanks to "miramor" for doing
  most of the actual work on this.)
- Removed Alchemist class from ToME module. They were horribly broken
  and encouraged only scummy play. They were also indirectly
  responsible for a lot of items that were junk to every other
  character class.
- Remove Runecrafer class.
- Increased size of the home drastically.
- Fix "far reaching attack" skill. (Thanks to "miramor".)
- Remove pointless player stats such as "gender", "age", "height",
  etc.
- Disallow casting for Posessors when they don't have enought SP.
  (aka "Remove system shock".)
- Magic Mapping now maps the whole level instead of only the display
  region.
- Summoned monsters appear around summoner instead of player.
- Remove various mostly inconsequential options.
- Use PCG random number generator instead of the old custom one.
- Grant player full monster knowledge.
- Theme: Fix final guardian artifact for Land of Mountains.
- Theme: Remove armor restriction for Eagle/Dragon races.

Build:

- Use C++14.
- Use (vendored) "cppformat" for string formatting.
- Use (vendored) "jsoncons" instead of "jansson".
- Produce individual executables for each of the supported platforms
  instead of a single executable.