installation: postgresql driver dependency

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
sqlalchemy: name addition for Enum types

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
ranker: fix missing column in RnkCITATIONDICT

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
sqlalchemy: postgresql types support
legacy: support for postresql engine in dbquery

* Adds dynamic loading of legacy SQL functions for different database
  engines.  (addresses #2020)
base: gentler web page title warning

* Prints a bootstrap-themed warning in legacy pages.
  (PR #2215) (closes #2198)

Signed-off-by: Leonard Rossi <leonardo.r@cern.ch>
legacy: dbdump refactoring fix

* Adds missing functions from master to dbquery, which caused e.g.
  dbdump to not work. (closes #2088)

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
legacy: dbquery pep8/257 fixes

* Fixes most PEP8/PEP257 errors in dbquery.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>