Further changes to property group and class group membership, primarily for Service and its subclasses but also to enable a create option for a hasPart relationship with geographic locations
Merge branch 'maint-rel-1.6' of github.com:vivo-project/VIVO into maint-rel-1.6
VIVO-596 adding Grant properties to Contract
VIVO-586: added css selector
Merge branch 'maint-rel-1.6' into develop