Perhaps add a mechanism for defining custom directory structure/hierarchy

[reedjones]

instead of adding a 'this' or 'that' folder, perhaps a mechanism for defining the folder structure. eg maybe 'People' is not important because you're talking about zoology so you instead have an 'Animals' directory

/my folder /another folder /some other folder /structure.substrate <- ----- this file contains some data structure that tells about the hierarchy/directory structure

related: https://github.com/human-substrate/Substrate/issues/17 https://github.com/human-substrate/Substrate/issues/16 https://github.com/human-substrate/Substrate/issues/18