- the whole OperationContext/QueryContext/SelectionContext thing greatly scaled back;

- the whole OperationContext/QueryContext/SelectionContext thing greatly scaled back;
all MapperOptions process the Query and that's it, one very simpliied QueryContext object gets passed
around at query.compile() and query.instances() time
- slight optimization to MapperExtension allowing the mapper to check for the presence of an extended method, takes 3000 calls off of masseagerload.py test (only a slight increase in speed though)
- attempting to centralize the notion of a "path" along mappers/properties, need to define what that is better.  heading towards [ticket:777]...