Merge pull request #4819 from RosettaCommons/JWLabonte/sugars/database
Carbohydrates: adding thiolated sugars to the database
This merge will add thiolated sugars into the Rosetta database.
(This merge integrates work started by former student @qjia73 and was expanded by @jonpliu .)
Thiol nomenclature will be added in PR #4793.