Add prototype tutorials

Author: Jessica Lin

prototype_source/README.txt

@@ -7,3 +7,15 @@ Prototype Tutorials
 2. graph_mode_static_quantization_tutorial.py
 	   Graph Mode Post Training Static Quantization in PyTorch
 	   https://pytorch.org/tutorials/prototype/graph_mode_static_quantization_tutorial.html
+	   
+3. graph_mode_dynamic_bert_tutorial.rst
+	   Graph Mode Dynamic Quantization on BERT
+	   https://github.com/pytorch/tutorials/blob/master/prototype_source/graph_mode_dynamic_bert_tutorial.rst
+
+4. numeric_suite_tutorial.py
+	   PyTorch Numeric Suite Tutorial
+	   https://github.com/pytorch/tutorials/blob/master/prototype_source/numeric_suite_tutorial.py
+
+5. torchscript_freezing.py
+	   Model Freezing in TorchScript
+	   https://github.com/pytorch/tutorials/blob/master/prototype_source/torchscript_freezing.py