BibClassify: case insensitive taxonomy

* Fixes a bug where the look-up of ontology names from the
  taxonomies were forced to lower case.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
You are right. Removed it. Still there is a lot of mentions of standalone mode, but that is for another time. At least it is removed at the main docstring now.