runCommand -package:structured-cli -package:github-release -package:shake -package:options -package:wai-app-static -is:exact is:exact -package:graphviz -package:cabal-install -package:hledger -package:pandoc-plot -package:mongoDB -package:process -package:libmpd

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.