Extend Solr search as class from existing python file

[eseiver]

[From old repository]

Right now get_solr_records (to be renamed search_solr_records) is a single function with several parameters. It would be better to flesh out this functionality as a Request class in the vein of the Python 2.7 Solr wrapper from the PLOS ALMs package (Cameron Neylon's version, which is the best and most up-to-date).
It would need to be made Python 3 compatible, but I think would provide a better method of querying Solr than the current version.