Add a recipe for runner.

Summary: Improved "open with" suggestions for dired mode in Emacs. This
  library links a set of shell commands to file or directory names.
  These commands can then be used in dired mode using
  dired-do-shell-command (by pressing “!”).

Association with package: I like the package a lot

Link to package repository: https://github.com/thamer/runner

Communication with package maintainer: none, the package was already ready.

Tests: the package builds and installs properly