gird 0.1.1

A command line tool and library for downloading release artifacts
Documentation
# Gird

Gird is a command-line tool for downloading release
artifacts. Currently, it supports downloading from GitHub releases,
and there’s room to expand it to other, similar sources.

## Downloading from GitHub

Given an artifact name, user name, and repository name, Gird will
locate the most recent release for that repository, find a release
artifact with a matching file name, and download it.

For example, to download the current [rqlite](https://rqlite.io/)
release for linux on amd64, we can do the following:

```
$ gird linux-amd64 -e musl github rqlite rqlite
```

In that example, `linux-amd64` is telling gird that we want a release
file which contains “linux-amd64” in its file name, `-e musl` is
telling it that we *don’t* want the variant that has
“linux-amd64-musl“ in its file name even though it would otherwise
match, `github` is telling it that it should source the file from a
GitHub release, the first `rqlite` is telling it to look under the
GitHub user called “rqlite” and the second `rqlite` is telling it that
we want that user’s repository which is also called “rqlite”.

Gird will look through the current GitHub release for the specified
repository, find a matching file
(e.g. **rqlite-v8.23.0-linux-amd64.tar.gz**), and download it.