docs: def clean():
      """Remove build, dist, egg-info garbage."""
      d = ['build', 'dist', 'scikits.audiolab.egg-info', HTML_DESTDIR,
              PDF_DESTDIR]
      for i in d:
          paver.path.path(i).rmtree()
  
      (paver.path.path('docs') / options.sphinx.builddir).rmtree()