slight modification to QuiverFactory to implement changes discussed in !25
slight modification to QuiverFactory to implement changes discussed as part of !25 (merged). This means adding a list called pairs
that is modified through a series of conditionals within QuiverFactory.call before finally being used to construct a set of FeatureVectors which are assembled in a Quiver.
I've tested this with KWClassifierDatas and it is perfectly happy with the changes. As far as I can tell, the workflow just goes like we'd want.