authorlist: initial release
- Adds new module inside /invenio/invenio/modules for authorlist.
- Adds SQLAlchemy models for 6 new tables. (closes #1891)
Signed-off-by: Mateusz Susik <mateuszsusik@gmail.com>
Reviewed-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>