Make ws_object_attr_read() consider basetype
Make ws_object_attr_write() consider basetype
Add object type for testing basetype considering algorithm
Add test for getting attribute type with basetype consideration
Add test for attribbute reading with basetype checking
Add attribute writing test with basetype checking
Merge pull request #631 from matthiasbeyer/add-obj_attr_getter_setter_basetype

Add attribute reading/writing with basetype checking