JannisNe/timewise: v0.1.8

What's Changed The biggest change is the definition of the metadata flux difference for flux and flux density. It's now actually the difference instead of the relative change (see this). Minor changes: Adds point source utils. Stabilises WiseBigDataDESYCluster and adds the bigdata_dir which allows for storage in a location different to the working directory data_dir. Update documentation. Full Changelog: https://github.com/JannisNe/timewise/compare/v0.1.7...v0.1.