rgl2gltf 1.0.0

• Added a NEWS.md file to track changes to the package.
• Added “rigid” method animation to playgltf().
• Added gltfwidget() to play in WebGL.
• Added debugging function showTags().
• Added shader support for skins.
• Added findEntry() debugging function.
• Added modifyShaders() function to edit shaders.
• Added shader for normal textures.
• Added getTangents() to use MikkTSpace code to assign tangents if they are not specified. These can be used in normal textures.
• Textures may now be specified in JPEG format, not just PNG.
• writeglTF() now writes the binary part of the file as well as the JSON part.
• Added “physically based rendering” (PBR) methods.
• Fixed baseColorTexture and bufferView.target errors (issue #38).
• Fixed type errors (issue #38).
• Now writes colors using normalized bytes (issue #40).
• Modified mikktspace.c for C99 compatibility.