BibAuthorID: current institution addition

* Amends the web API to include the current institution in 371__z.

* Improves indentation in the personal details box template.

Reviewed-by: Gilles Louppe <g.louppe@gmail.com>
Reviewed-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Signed-off-by: Mateusz Susik <mateusz.susik@cern.ch>