title: Setting column names in gota
body: <p>I have a dataset without column names defined. How can I assign these programmatically using gota? For comparison, <a href="https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.rename.html" rel="nofollow noreferrer">Pandas</a> has <code>df.rename</code>.</p>
  <p>Say my data looks like this:</p>
  <pre><code>1,2,3
  4,5,6
  7,8,9
  </code></pre>
  <p>I basically want this in my dataframe:</p>
  <pre><code>A,B,C
  1,2,3
  4,5,6
  7,8,9
  </code></pre>