Changed the hashing to use the nice function within nomad.utils. Also the hash lengths are now different based on the expected complexity of the input space.

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.

Improved system_type detection

See merge request !77

Added structure_type, structure_prototype and strukturbericht_designation to EncyclopediaNormalizer.

Release v0.7.2

See merge request !79

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.