Peter M. Groen / openbr

Bitdeli is broken

…thin the function is empty

This allows br -objects to work, and the transform will then just crash in
project.

This reverts commit 2f12e845d71d7189bfaa08a94f23b73f09685f91.

Defaulting to ClusterID did not make much sense, since the key being indexed is
in fact the ground truth, not the cluster labels (cluster labels are stored as
indices in a csv file, not a gallery).

Also, use Format to read similarity matrices instead of assuming mtx is in use.

This reverts commit 724fe0c5d16ceac690b22a1166ee611cfbf14f16.