Populates authors from invenio repository

* Populates author list, taking demo site and test related file
  authorship from the Invenio source code repository.

* Improves rst syntax of the signature in the file footers.

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
Merge branch 'maint-0.99' into maint-1.0

* maint-0.99:
  Populates authors from invenio repository

* NOTE The merge commits adds demo site related authors
  from the main Invenio maint-1.0 branch.

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>