title: Set max string length in pandas
body: <p>I want my dataframe to auto-truncate strings which are longer than a certain length.</p>
  
  <p>basically:</p>
  
  <pre><code>pd.set_option('auto_truncate_string_exceeding_this_length', 255)
  </code></pre>
  
  <p>Any ideas?  I have hundreds of columns and don't want to iterate over every data point.  If this can be achieved during import that would also be fine (e.g. pd.read_csv())</p>
  
  <p>Thanks.</p>