title: Tensorboard error: 'Tensor' object has no attribute 'value'
body: <p>My goal: Add arbitrary text to tensorboard.</p>
  
  <p>My code:</p>
  
  <pre><code>text = "muh teeeext"
  summary = tf.summary.text("Muh taaaag", tf.convert_to_tensor(text))
  writer.add_summary(summary)
  </code></pre>
  
  <p>My error:</p>
  
  <pre><code>  File xxx, line xxx, in xxx
      writer.add_summary(summary)
    File "/home/xxx/.local/lib/python3.5/site-packages/tensorflow/python/summary/writer/writer.py", line 123, in add_summary
      for value in summary.value:
  AttributeError: 'Tensor' object has no attribute 'value'
  </code></pre>