removed hasValue from PropertyNode
basic documentation for PropertyNode
renamed PropertyNode to PolymakeObjectPropertyTreeNode
more cleanup in PolymakeObjectPropertyTreeNode
forgot to retain the property name
we should also deallocate a PolymakeObjectPropertyTreeNode…
added initializers and dealloc to PropertyNodeValue
added PropertyNodeValue to class notes
started data structure for the polymake type of properties
store structured data type for polymake property values
corrected property type extraction