QED tests
Created by: niclaurenti
PR made to address issue #1735 (closed) , i.e. to create a low precision QED theory (similar to theory 399) that will be used to test the code and in particualr the photon module of validphys.
Created by: niclaurenti
PR made to address issue #1735 (closed) , i.e. to create a low precision QED theory (similar to theory 399) that will be used to test the code and in particualr the photon module of validphys.