runCommand -package:options -package:shake -package:beam-migrate -package:shake-plus -package:libmpd -package:quickcheck-state-machine is:exact -package:pandoc-plot -package:cabal-install -package:mongoDB -package:graphviz

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.