Adding MERIT statements for gquery purposes
Adding MERIT statements for gquery purposes

As written by @antw here:
- https://github.com/quintel/etmodel/issues/2083\#issuecomment-212889583
  and
- https://github.com/quintel/etmodel/issues/2083#issuecomment-212927498

quintel/etengine,quintel/etengine,quintel/etengine,quintel/etengine