Packaging newdoc

The following are instructions for the maintainers of newdoc to package and distribute new releases.

Packaging and distributing newdoc as an RPM package

Log into the Copr repository administration: https://copr.fedorainfracloud.org/coprs/mareksu/newdoc-rs/.
Go to the Builds tab.
Click New Build.
Select SCM.
In the Clone url field, paste https://github.com/redhat-documentation/newdoc.
In the Spec File field, use newdoc.spec.
Click Build.

If you are publishing to Crates.io for the first time on this system, log into your account:
```
$ cargo login
```
You can manage your login tokens in your account settings: https://crates.io/me.
Publish the latest version of newdoc to Crates.io:
```
$ cargo publish
```