Add a tool to look at raw data

examples/gold_ball_ptycho.py

@@ -32,5 +32,6 @@ with open('example_reconstructions/gold_balls.pickle', 'wb') as f:
     pickle.dump(model.save_results(dataset),f)
     
 model.inspect(dataset)
+dataset.inspect()
 model.compare(dataset)
 plt.show()

examples/specular_pinhole_ptycho.py

@@ -41,5 +41,6 @@ for i, loss in enumerate(model.Adam_optimize(250, dataset,batch_size=5)):
 
 
 model.inspect(dataset)
+dataset.inspect()
 model.compare(dataset)
 plt.show()