New property added to BioChemEntity

Dear all,

A new property has been added to BioChemEntity. This property MUST 
contain the name of the profile so it will be easier for validators and 
tools to distinguished one profile from another.

property: preferredLabel
expectedType: Text
Description: Indicates the preferred label to refer to a specific 
(sub)type of BioChemEntity Bioschemas description: Profile name
Marginality: MinimumCardinality: ONEBioschemas description: Bioschemas 
profiles Regards,