code: def missing_or_other_newer(path, other_path, cwd=None):
      
      cwd = cwd or '.'
      path = get_abspath(path, cwd=cwd)
      other_path = get_abspath(other_path, cwd=cwd)
      if not os.path.exists(path):
          return True
      if os.path.getmtime(other_path) - 1e-6 >= os.path.getmtime(path):
          # 1e-6 is needed beacuse http://stackoverflow.com/questions/17086426/
          return True
      return False
docs: Investigate if path is non-existant or older than provided reference
      path.
  
      Parameters
      ==========
      path: string
          path to path which might be missing or too old
      other_path: string
          reference path
      cwd: string
          working directory (root of relative paths)
  
      Returns
      =======
      True if path is older or missing.