Gmdm

- Support new syntax

**Full Changelog**: https://github.com/knno/gmdm/compare/v0.2.7...v0.2.8

**Full Changelog**: https://github.com/knno/gmdm/compare/v0.2.6...v0.2.7

[New] Improved JSON loading of assets to speed up the processing. (Only get the parent part inside the asset YY file.)
[New] Remove the --back option and make it default.

[Fixed] Bugs when comparing directories.
[Fixed] Bugs when creating and resolving folders.
[Fixed] Create subsequent folders automatically on sync.