Added icon from doc/images/sas-ai.jpg to readme header
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<h1>DLPy - SAS Viya Deep Learning API for Python</h1>
-<img src="docs/sas-deep-learning.jpg" alt="SAS Deep Learning Icon" height="200">
+<img src="doc/images/sas-ai.jpg" alt="SAS Deep Learning Icon" height="150">
<p>An efficient way to apply deep learning methods to image, text, and audio data.</p>
<a href="https://www.sas.com/en_us/software/viya.html">
