Affinity vs Affinity 2018 mix detection

[samuelhorwitz]

This probably also applies to Halcyon/Halcyon 2016. There are some tracks that are makes of older tracks that aren't labeled in a way we automatically detect through our track tagging/remix exclusion algorithm.

Either we have to make it better or write in special cases. Special cases is probably better, some stuff just is only doable through data management.