Create support infrastructure for author handling in LSST commissioning papers

For the commissioning papers (and overview paper) we need a scheme for managing author lists in a standardized way. The overview paper has some infrastructure for this but the scripts need to be modified to separate the author list for a specific paper from the author full name and affiliation.

In theory the name and affiliation information should come from contacts DB. In the interim I will use an intermediary YAML file.