Update README.md

Author: Siccity

README.md

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 glTF is a new opensource 3d model transmission format which supports everything you'll ever need from a format in Unity.
 [Read more about glTF here](https://www.khronos.org/gltf/)
 
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 ### What makes GLTFUtility different?
 Focusing on simplicity and ease of use, GLTFUtility aims to be an import-and-forget solution, keeping consistency with built-in functionality.