BisCore 1.0.15 has been released

[diegoalexdiaz]

This new schema version introduces ECXML 3.2.

Two new relationships were added:

• PhysicalSystemAggregatesSubSystems enabling hierarchies of Systems.
• SubjectRefersToSubject enabling associations across branches of the Subject hierarchy.

PhysicalMaterial.Density property added.

The following properties were marked as hidden:

• DefinitionElement.IsPrivate
• TypeDefinitionElement.Recipe

The multiplicity's roleLabel was clarified for "is of type" relationships.

Description tweaks and improvements throughout.