Add options for axis labels, modifications accoding to the move of click options to bob.extension, print assert outputs for tests

[sphinx] Documented the metadata info

Fixed issue in the projector metadata

Included metadata durint the feature extraction. Ongoing with cd workspace_HTFace/

Included metadata durint the feature extraction. Ongoing with cd workspace_HTFace/

Removed dummy-missingfiles database

Created a mechanism to return None at certain probability

Documented configuration file as the default way of running experiments; other small documentation changes and corrections

script/fusion_llr.py was not getting installed with setuptools.

Fixed load_resource to be less critical and always choose one of the registered resources, if possible; updated setup.py

Added single scripts to run preprocessing, extraction, enrollment and scoring separately; Fixed command line use None by default