Added example animation code usage

assignment_anim.py

+import glob
+from manduca import SimpleManduca, Manduca
+from manduca.Visualization import animate, animate_as_gif, animate_as_mp4
+
+manducas = []
+for m_file in glob.glob('fittest_manduca_*.npz'):
+    if "complex" in m_file:
+        manduca = Manduca.load(m_file)
+    else:
+        manduca = SimpleManduca.load(m_file)
+    manducas.append((manduca, m_file.replace(".npz","").replace("fittest_manduca_","")))
+
+animate(manducas[0])
+animate_as_gif('one_manduca.gif', manducas[0])
+animate_as_mp4('one_manduca.mp4', manducas[0])
+
+multi_kwargs = {'dpi':200, 'show_winners':True, 'show_fitnesses': True, 
+                'subplot_kwargs':{'figsize': (16,9)}}
+animate(*manducas, **multi_kwargs)
+animate_as_gif('all_manducas.gif', *manducas, **multi_kwargs)
+animate_as_mp4('all_manducas.mp4', *manducas, **multi_kwargs)