Added script for performing MiniBatchKMeans for descriptors in an index
Added script for performing MiniBatchKMeans for descriptors in an index

Outputs a pickled dictionary mapping cluster IDs to descriptor UUIDs.

Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK