BString, my friend

Changed

• Use bstr for the slow multibyte path to cope with invalid UTF-8.

Fixed

• Parse --files-from and --files0-from arguments properly.

Better arguments, more signals

Added

• Some basic tests.

Changed

• Hook up SIGINFO handler to SIGUSR1 on inferior Unix-like platforms.
• Split into library and binary (#1)

Fixed

• Multiple -m and -c arguments.

Threads and file lists

Added

• CHANGELOG.md.
• --threads support, defaulting to off.
• --files0-from and --files-from, similar to GNU wc.

Changed

• ~15% performance bump for slow -w and -mw paths.
• -m and -c now toggle each other.

Faster!

• Refactor code path definitions.
• Add optimized code path for codepoint counting.
• Improve byte and character slow paths ~15%.

Faster unicode line lengths

• Add line length support to the codepoint path.
• Complete SIGINFO support for BSDs.
• Refactor code path handling.

Faster line lengths

Add a fast code path for -L using memchr.

Initial crates.io release

It mostly agrees with BSD wc.

Mostly.