Add beginner youtube tutorials (#1743)

* Create introyt.rst

* Create tocyt.txt

* Create introyt1_tutorial.py

* Create tensors_deeper_tutorial.py

* Create autogradyt_tutorial

* Create modelsyt_tutorial.py

* Create tensorboardyt_tutorial.py

* Create trainingyt_tutorial.py

* Update introyt1_tutorial.py

* Create captumyt_tutorial.py

* Rename autogradyt_tutorial to autogradyt_tutorial.py

* added intro youtube files to index

* Create README file in the introyt folder

* Added tensorboard to requirements.txt

* fixed the math formula rendering

* fixed runtime error

* removed runnable code

* removed _tutorial from captumyt

* fixed runtime error

* Rename trainingyt_tutorial.py to trainingyt.py

* removed _tutorial from trainingyt

* Rename beginner_source/introyt/introyt.rst to beginner_source/introyt.rst

* moved introyt toc out of the introyt folder

* updated link paths

* updated link paths

* fixed broken links

* fixed broken links

* fixed broken links

* fixed broken links

* Update modelsyt_tutorial.py

* fixed broken links

* fixed broken links

* fixed broken links

* fixed broken links

* Update trainingyt.py

Author: holly1238

beginner_source/introyt.rst

@@ -0,0 +1,29 @@
+`Introduction <introyt/introyt1_tutorial.html>`_ ||
+`Tensors <introyt/tensors_deeper_tutorial.html>`_ ||
+`Autograd <introyt/autogradyt_tutorial.html>`_ ||
+`Building Models <introyt/modelsyt_tutorial.html>`_ ||
+`TensorBoard Support <introyt/tensorboardyt_tutorial.html>`_ ||
+`Training Models <introyt/trainingyt.html>`_ ||
+`Model Understanding <introyt/captumyt.html>`_
+
+Introduction to PyTorch - YouTube Series
+========================================
+
+Authors: 
+`Brad Heintz <https://github.com/fbbradheintz>`_
+
+This tutorial follows along with the `PyTorch Beginner Series <https://www.youtube.com/playlist?list=PL_lsbAsL_o2CTlGHgMxNrKhzP97BaG9ZN>`_ on youtube.
+
+`This tutorial assumes a basic familiarity with Python and Deep Learning concepts.`
+
+Running the Tutorial Code
+-------------------------
+You can run this tutorial in a couple of ways:
+
+- **In the cloud**: This is the easiest way to get started! Each section has a Colab link at the top, which opens a notebook with the code in a fully-hosted environment. Pro tip: Use Colab with a GPU runtime to speed up operations *Runtime > Change runtime type > GPU*
+- **Locally**: This option requires you to setup PyTorch and TorchVision first on your local machine (`installation instructions <https://pytorch.org/get-started/locally/>`_). Download the notebook or copy the code into your favorite IDE.
+
+.. include:: /beginner_source/introyt/tocyt.txt
+
+.. toctree::
+   :hidden:

beginner_source/introyt/README.txt

@@ -0,0 +1,34 @@
+Introduction to PyTorch on YouTube
+----------------------------------
+
+1. introyt.rst
+    Introduction to PyTorch - Youtube Series
+    https://pytorch.org/tutorials/beginner/introyt/introyt.html
+
+2. introyt1_tutorial.py
+    Introduction to PyTorch
+    https://pytorch.org/tutorials/beginner/introyt/introyt1_tutorial.html
+
+3. tensors_deeper_tutorial.py
+    PyTorch Tensors
+    https://pytorch.org/tutorials/beginner/introyt/tensors_deeper_tutorial.html
+
+4. autogradyt_tutorial.py
+    The Fundamentals of Autograd
+    https://pytorch.org/tutorials/beginner/introyt/autogradyt_tutorial.html
+
+5. modelsyt_tutorial.py
+    Building Models with PyTorch
+    https://pytorch.org/tutorials/beginner/introyt/modelsyt_tutorial.html
+
+6. tensorboardyt_tutorial.py
+    PyTorch TensorBoard Support
+    https://pytorch.org/tutorials/beginner/introyt/tensorboardyt_tutorial.html
+
+7. trainingyt_tutorial.py
+    Training with PyTorch
+    https://pytorch.org/tutorials/beginner/introyt/trainingyt_tutorial.html
+    
+8. captumyt_tutorial.py
+    Model Understanding with Captum
+    https://pytorch.org/tutorials/beginner/introyt/captumyt_tutorial.html