Spruce TK 0.9.0

New features

Spruce TK has a limited API that is in a preliminary state until the 2018.Oct release. The currently available classes in the API are OESecondaryStructureSuperposition, OEStructuralSuperposition, and OESuperpositionOptions. The currently available functions are OEExtractBioUnitsFromRef and OEExtractBioUnitsFromPDBRemarks.