NOTE This currently uses the beta compiler so it can use the 2018 edition. I won't push it to crates.io until 2018 stabilizes.

To use this do

$ cargo +beta install --git https://github.com/derekdreery/cargo-docserve

And then from your project somewhere

$ cargo docserve

If you want to install a newer version do (notice the --force):

$ cargo +beta install --force --git https://github.com/derekdreery/cargo-docserve