message: Main page updates
  Minor refinements to the introduction.
  Add the MaterialX logo.
diff: -# MaterialX
  +<p align="center">
  + <img src="documents/Images/MaterialXLogo.png" height="170" />
  +</p>
  [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/materialx/MaterialX/blob/main/LICENSE.txt)
  [![Version](https://img.shields.io/github/v/release/materialx/MaterialX)](https://github.com/materialx/MaterialX/releases/latest)
  [![Build Status](https://github.com/MaterialX/MaterialX/workflows/main/badge.svg?branch=main)](https://github.com/MaterialX/MaterialX/actions?query=branch%3Amain)
  -MaterialX is an open standard for representing rich material and look-development content in computer graphics, allowing materials and shading models to be expressed independently of their authoring application or rendering environment. Launched at [Industrial Light & Magic](https://www.ilm.com/) in 2012, MaterialX has been a key technology in feature films such as _Star Wars: The Force Awakens_ and real-time experiences such as _Millennium Falcon: Smugglers Run_. The project was released as open source in 2017, with companies including Sony Pictures Imageworks, Pixar, Autodesk, Adobe, and SideFX contributing to its ongoing development. In 2021, MaterialX became the seventh hosted project of the [Academy Software Foundation](https://www.aswf.io/).
  +### Introduction
  +
  +MaterialX is an open standard for representing rich material and look-development content in computer graphics, enabling its platform-independent description and exchange across applications and renderers. Launched at [Industrial Light & Magic](https://www.ilm.com/) in 2012, MaterialX has been a key technology in their feature films and real-time experiences since _Star Wars: The Force Awakens_ and _Millennium Falcon: Smugglers Run_. The project was released as open source in 2017, with companies including Sony Pictures Imageworks, Pixar, Autodesk, Adobe, and SideFX contributing to its ongoing development. In 2021, MaterialX became the seventh hosted project of the [Academy Software Foundation](https://www.aswf.io/).
  ### Quick Start for Developers
  