Fixed issues with DOS normalization and added extended description to the metainfo description about the normalization procedure.

Refactored the setup.py. Using compiled arguments from deps, layers of extras. Some import refactoring to make the extra layers work.

Increased symemtry tolerance to +/-0.1 angstrom (=symmemtry_threshold=0.2). This seems like a more reasonable threshold as relaxed structures may not follow symmetries so exactly. Added tests for bulk material identification.

Updated the AFLOW prototype data. The new data is stored within nomad-FAIR instead of using the one in nomadcore. Modified systemnormalizer to use this new data through the new structure.py module that is created for handling various structure-related tasks.