Ms2query

Added
- Added compound classes to sqlite file
- Compound classes are now automatically added in the library file creation pipeline.
- Smiles are added from the specific spectrum instead of from the inchikey.

Removed
- Compound classes cannot be added from csv file anymore. Download the newest version of the sqlite file to have compoudn classes again.

Changed
- Zenodo link is set to latest version instead of specific version.

Code structure
- Unit tests had mayor reformatting
- Better use of global fixtures
- Remove pickled results table files

- Set MS2Deepscore <2.0.0

- Fix h5py dependency issue

- Downloading files is more modular.
- Loading only the models for training your own model is easier.
- The default settings for additional metadata are changed to match mgf files from feature based molecular networking
- Readme has been cleaned up

- Define the newest zenodo DOI in one location.

- Store random forest model in Onnx format