message: Finalize changelog for v1.36.3
diff: # Change Log
  -## [1.36.3] - Development
  +## [1.36.3] - 2019-08-02
  Merged shader code generation and physically-based shading nodes from Autodesk's ShaderX extensions. Added a default MaterialX viewer based on GLSL shader generation.
  @@ -9,11 +9,13 @@ Merged shader code generation and physically-based shading nodes from Autodesk's
  - Added the MaterialXRender library, providing helper functionality for rendering MaterialX content.
  - Added the MaterialXView library, providing a default MaterialX viewer.
  - Added the physically-based shading node library (libraries/pbrlib).
  -- Added a root-level 'resources' folder.
  -- Added support for the 'place2d' node.
  +- Added a root-level 'cmake' folder, including a standard FindMaterialX module.
  +- Added a root-level 'resources' folder, including example materials and meshes.
  +- Added documents for the 1.37 specification.
  ### Changed
  - Moved the MaterialX data libraries from 'documents/Libraries' to 'libraries'.
  +- Updated MaterialX node definitions to the 1.37 specification.
  - Updated the PyBind11 library to version 2.2.4.
  ### Removed
  