Show information about a package.

== USAGE
  omf describe <name>

== DESCRIPTION
Looks up a package whose name matches <name>.

== EXAMPLES
Show information about the *brew* package:

  omf describe brew

We get the following output:

  Package: brew
  Description: Oh My Fish plugin to integrate Homebrew paths into shell.
  Repository: https://github.com/oh-my-fish/plugin-brew
  Maintainer:

== ALIASES
*omf d*
