This marks the second major release since the C rewrite of chmap. There
were (to the best of my knowledge) two other releases, but I had forgotten
to tag them; in any case, they were barely usable.

Many things have changed since the Rust version:

• The name has changed (lcharmap => chmap).
• There is no "chars.db" living in ~/.local/share anymore; the Unicode info
  is baked into the executable itself.
• Multiple -r, -s, or -c flags may now be given at once.
• The -r flag supports hexadecimal (0x) and octal.
• The -c flag no longer deduplicates or sorts input. This may change in a
  future release.
• The virtually useless long flags (--chars, --range, --search) are gone.
• It'll probably be impossible to build this outside of a POSIX/WSL system
  (due to the use of the nonportable regex.h header). So, this will
  most likely not work on Windows.
• chmap is now much faster than it previously was, due to not having to
  open up a 2.8mb file to get information.
• A lot of other stuff.

A few minor notes:

• chmap is vastly more portable now, since the Rust toolchain isn't
  required to build it. (No, I haven't forgotten about the regex thing.)
• The binary now weighs 29mb(!), compared to 12mb for the Rust version.
  (This is because of all the Unicode data baked into the executable.)
• I now have to wait about 13 seconds to do a clean release build. Compare
  that to the 3-and-a-half minutes it took to build the Rust version
  (including the 15 crates(!) it required). Alright, I'm done trashing
  Rust.