added flag for suppressing Json output from cppgen
added flag for suppressing Json output from cppgen

cambridgehackers/connectal,cambridgehackers/connectal,chenm001/connectal,csail-csg/connectal,csail-csg/connectal,chenm001/connectal,chenm001/connectal,cambridgehackers/connectal,chenm001/connectal,cambridgehackers/connectal,csail-csg/connectal,chenm001/connectal,cambridgehackers/connectal,csail-csg/connectal,csail-csg/connectal