3d Tiles Versions Save

Release of the 3D Tiles specification, version 1.1

Additions:

• Support for structured metadata that can be associated with tilesets, tiles, tile content, and tile content groups
• Directly support glTF assets as tile contents
• Support for multiple tile contents
• Support for implicit tiling schemes

Deprecations:

• The original tile formats (b3dm, i3dm, pnts, and cmpt) are deprecated in favor of glTF content
• The tileset.properties are deprecated, in favor of the more versatile metadata support