Make the BSD 3-Clause license easier to see by adding a LICENSE file
to the repository. Use the same format as https://golang.org/LICENSE.

At this time, the go.mod file specifies only the module path,
and nothing more.

In the future, it can be expanded to specify additional information,
such as the required modules and their versions, and the expected
Go language version. This will be considered after some time passes,
and the long-term implications of doing so are better understood.

This package has moved slightly.

	name     time/op
	Parse-8  629ns ± 3%

The performance of strings.Split on a 1-byte length string is very
good (optional CPU features and assembly are employed), and a naive
custom implementation is significantly slower (1100-2500 ns/op).