Add ClassyFire compound classifications to biochemistry compounds

[JamesJeffryes]

"ClassyFire is a web-based application for automated structural classification of chemical entities. This application uses a rule-based approach that relies on a comprehensible, comprehensive, and computable chemical taxonomy. ClassyFire provides a hierarchical chemical classification of chemical entities (mostly small molecules and short peptide sequences), as well as a structure-based textual description, based on a chemical taxonomy named ChemOnt, which covers 4825 chemical classes of organic and inorganic compounds. Moreover, ClassyFire allows for text-based search via its web interface. It can be accessed via the web interface or via the ClassyFire API."

Potentially very helpful for searching models and generating compound information
https://jcheminf.springeropen.com/articles/10.1186/s13321-016-0174-y