title: Can you have an executable and library in the same cabal package
body: <p>I'm new using cabal and I need my package to include a small executable as well as the whole library.
  Is it possible to do so (to export an executable AND a library) or does a cabal package have a <code>type</code> (executable OR binary).
  Is it also possible to export many executable in the same packagke ?</p>