docs: def add_fabfile():
      """
      Copy the base fabfile.py to the current working directory.
      """
      fabfile_src  = os.path.join(PACKAGE_ROOT, 'fabfile.py')
      fabfile_dest = os.path.join(os.getcwd(), 'fabfile_deployer.py')
  
      if os.path.exists(fabfile_dest):
          print "`fabfile.py` exists in the current directory. " \
                "Please remove or rename it and try again."
          return
  
      shutil.copyfile(fabfile_src, fabfile_dest)