|Δm²₃₂| and |Δm²₃₁| to v1a version. In Day Bay official analysis |Δm²₃₂|
as leading mass splitting.
- [feature] Add key `override_cfg_files` that allows to override paths
to configuration files. Key is supported for models v1+.
- [feature] Remove `source_type` parameter from version v1+. Now
`source_type` is determined automatically from `path_data`. To override
default value, just path `path_data` to your model.