~~~~~
2017-04-05
* Several bugfixes.
* Docstrings for all classes according to numpy standard.
* Outsourced help functions in module `utils`.
* Import classes in `__init__` to allow top level import.
* New methods for `ScopusAuthor()`: `n_yearly_publications()`.
* New properties for `ScopusAbstract()`: `citationType`, `citationLanguage`, `refcount`, `references`, `subjectAreas`, `website`.
* Raising exception when download status is not ok.
* Python2.7 compatibility.