title: seaborn "kde jointplot" doesn't have color mapping in the latest version (0.11.0)
body: <p>I was running <code>seaborn ver. 0.10.1</code> on my jupyter notebook. This morning I upgraded to the latest version <code>0.11.0</code>. Now, my kde jointplot doesn't give the color mapping that it used to. The code is the same. Only the versions are different.</p>
  <pre><code>import numpy as np
  import pandas as pd
  import matplotlib.pyplot as plt
  import seaborn as sns
  
  %matplotlib notebook
  
  np.random.seed(1234)
  
  v1 = pd.Series(np.random.normal(0,10,1000), name='v1')
  v2 = pd.Series(np.random.normal(60,15,1000), name='v2')
  v3 = pd.Series(2*v1 + v2, name='v3')
  
  # set the seaborn style for all the following plots
  sns.set_style('white')
  
  sns.jointplot(v1, v3, kind='kde', space=0);
  </code></pre>
  <p><img src="https://i.stack.imgur.com/8Cc7O.png" alt="Link to the image (This is my first question, I can't embed an image)" /></p>