celery: make Redis default broker

* Makes Redis the default broker for Celery.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Acked-by: Jiri Kuncar <jiri.kuncar@cern.ch>
BibClassify: new API

* Adds a new API module for use by workflow tasks.

* Several updates and fixes to the module to improve output.

* Moves a function for easier future optimization,
  simplifying some operations.

Tested-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
base: sticky footer fix

* Fix sticky footer issue on pages with content longer than 100% window
  size, by updating to the reference sticky footer implementation for
  Bootstrap3.

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>