OEFormat_OEB now supports the reading and writing of receptor
information on OEMCMolBase conformers. Previously, only
were supported. The receptor APIs should
still be used only on the active conformer of multi-conformer
molecules; see OEMCMolBase.GetActive.
OEFormat_OEB will no longer have receptor data
written to it twice. This caused the receptor OEBs to be
approximately twice as large but was otherwise harmless.