code: def version():
      
      log.info('gcdt version %s' % __version__)
      tools = get_plugin_versions('gcdttool10')
      if tools:
          log.info('gcdt tools:')
          for p, v in tools.items():
              log.info(' * %s version %s' % (p, v))
      log.info('gcdt plugins:')
      for p, v in get_plugin_versions().items():
          log.info(' * %s version %s' % (p, v))
      generators = get_plugin_versions('gcdtgen10')
      if generators:
          log.info('gcdt scaffolding generators:')
          for p, v in generators.items():
              log.info(' * %s version %s' % (p, v))
docs: Output version of gcdt tools and plugins.