~~~
2019-05-28
* Cache files in subfolders according to the used view.
* Add method `.estimate_uniqueness()` to `AuthorRetrieval()` to estimate how unique an author profile is.
* Use error message provided by Scopus for ScopusErrors.
* Add tip how to deal with "KeyError: 'eid'".
* Remove deprecated classes, modules, parameters and attributes. Removed deprecated classes are `ScopusAbstract()`, `ScopusAffiliation()`, `ScopusAuthor()` and `report()`. Removed deprecated parameters are start and max_entries in `AuthorSearch()` and `AffiliationSearch()`. Removed deprecated attributes include only `ScopusSearch.EIDS`.