title: Problem with GMM library from sklear.mixture?
body: <p>I want to run this example about 1D Gaussian Mixture Example: <a href="http://www.astroml.org/book_figures/chapter4/fig_GMM_1D.html" rel="noreferrer">http://www.astroml.org/book_figures/chapter4/fig_GMM_1D.html</a> 
  But I have this error all the time: </p>
  
  <pre><code>    from sklearn.mixture import GMM
  ImportError: cannot import name 'GMM'
  </code></pre>
  
  <p>I tried to replace it by from <code>sklearn.mixture import GaussianMixture</code>  but the code does not work, they do not have the same functionalities.</p>
  
  <p>Thank you in advance. </p>