Remember previously entered data

And use it as default.

So CLI would look something like:

``` sh
> Your name [Nik Butenko]:
> Your email (will be publicly available, optional) [nik@butenko.me]:
> Your GitHub public username [nkbt]:
> Package name [test]: another-test
> Package description [Test Package]: Something else
```

This information can be stored in either home user dir `~/.cloverfield/.cf-package/input.json` or in default temp dir

Start by locating the CLI prompt flow that collects the name, email, GitHub username, package name, and description. Check how defaults are currently supplied, then implement persistence in the proposed home-directory or temporary-directory location and verify that a later run reuses the saved values.

Written by the indexing model from the issue text.