Changes to RCSB Output from PDB Connector/SMILES Query/Describe Heterogens and PDB Downloader nodes

More changes from the RCSB webservices overnight (11-12 July 2017):

Many values which were previously all uppercase are now in titlecase or lowercase.

Changes in the mmCif output returned which likely relates to

Nodes all still work OK, but beware of downstream consequences in how you are handling data!