higher resolution images

Author: m3brown

functional-python.ipynb

@@ -643,7 +643,7 @@
    },
    "source": [
     "## Dealing with Concurrency: Future\n",
-    "![Future class diagram](img/future-diagram.jpg)"
+    "![Future class diagram](img/future-diagram.png)"
    ]
   },
   {

functional-python.slides.html

@@ -15434,7 +15434,7 @@ <h2 id="Dealing-with-Exceptions:-Try">Dealing with Exceptions: Try<a class="anch
 <div class="jp-Cell-inputWrapper">
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-<h2 id="Dealing-with-Concurrency:-Future">Dealing with Concurrency: Future<a class="anchor-link" href="#Dealing-with-Concurrency:-Future">&#182;</a></h2><p><img src="img/future-diagram.jpg" alt="Future class diagram"></p>
+<h2 id="Dealing-with-Concurrency:-Future">Dealing with Concurrency: Future<a class="anchor-link" href="#Dealing-with-Concurrency:-Future">&#182;</a></h2><p><img src="img/future-diagram.png" alt="Future class diagram"></p>
 
 </div>
 </div>