WebSession: fix for settings data saving

* Addresses issue with Boolean field in settings forms.

* Saves form data instead of POST data from request.

Signed-off-by: Krzysztof Lis <krzysztof.lis@cern.ch>
Co-authored-by: Jiri Kuncar <jiri.kuncar@cern.ch>
BibFormat: fix for bfe_fultext function

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
installation: SQLAlchemy version 0.8.2

* NOTE: Updates version of SQLAlchemy. Please run
  `pip install SQLAlchemy==0.8.2 --upgrade`.

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>