runCommand -package:options -package:shake -package:shake-plus -package:pandoc-plot is:exact -package:libmpd -package:process -package:github-release -package:io-streams -package:cabal-install -package:graphviz

Run a Command.
Runs a command using the shell.
Given a list of command/action pairs, prompt the user to choose a command using dmenu and return the corresponding action.