Add equal-to and non-equal-to operators
fix typo
GenericValue: document Array iterator functions
GenericValue: improve Erase documentation
GenericValue::Erase: pass ConstValueIterators
GenericValue: use generated assignment/destructor for GenericMember
GenericValue: add Erase function for object members
GenericValue: add tests for Erase(ConstMemberIterator[, ConstMemberIterator])