title: pandas plot doesn't show in ipython notebook as inline
body: <p>I'm trying to plot graph in ipython notebook inline, but <code>.plot()</code> methos just shows the object information, as </p>
  
  <pre><code>&lt;matplotlib.axes._subplots.AxesSubplot at 0x10d8740d0&gt;
  </code></pre>
  
  <p>but no graph. also i could make it show graph with <code>plt.show()</code>, but i want do it inline. so i tryed <code>%matplotlib inline</code> and <code>ipython notebook --matplotlib=inline</code>, but it was no helpful.</p>
  
  <p>If i use <code>%matplotlib inline</code>,  then <code>.plot()</code> shows </p>
  
  <pre><code>/Users/&lt;username&gt;/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/IPython/core/formatters.py:239: 
  FormatterWarning: Exception in image/png formatter: 'ascii' codec can't decode byte 0xe2 in position 0: ordinal not in range(128) FormatterWarning,
  </code></pre>
  
  <p>and using <code>ipython notebook --matplotlib=inline</code> shows same.</p>