Implement Title and Author matching for cases where DOIs are not sufficient.

[jhculb]

As a user I may have a dataset of records, some of which are without a DOI. I would like to be able to match these if there is enough information to make a confident match. I would like to see the reasoning for failure or the confidence of the match in the resulting data. This is so that I can better utilise the ORC for conversion of datasets that are dirtier or less well curated.