Merge pull request #193 from Unity-Technologies/HPE_tutorial

Added the Human Pose Estimation tutorial

Author: sleal-unity

README.md

@@ -21,6 +21,9 @@ Get your local Perception workspace up and running quickly. Recommended for user
 **[Perception Tutorial](com.unity.perception/Documentation~/Tutorial/TUTORIAL.md)**  
 Detailed instructions covering all the important steps from installing Unity Editor, to creating your first computer vision data generation project, building a randomized Scene, and generating large-scale synthetic datasets by leveraging the power of Unity Simulation.  No prior Unity experience required.
 
+**[Human Pose Estimation Tutorial](com.unity.perception/Documentation~/HPETutorial/TUTORIAL.md)**  
+Step by step instructions for using the Key Point and Human Pose Estimation tools included in the Perception Package. It is recommended that you finish Phase 1 of the Perception Tutorial above before starting this tutorial.
+
 ## Documentation
 In-depth documentation on individual components of the package.