Sizable improvement in multigrid for unsquared.

6000 matmuls CG unprec
2000 matmuls CG prec (4000 eo muls)
1050 matmuls PGCR on 16^3 x 32 x 8 m=.01

Substantial effort on timing and logging infrastructure

lib/lattice/Lattice_rng.h

@@ -233,7 +233,8 @@ namespace Grid {
       int words=sizeof(scalar_object)/sizeof(scalar_type);
 
       std::vector<scalar_object> buf(Nsimd);
-      
+
+PARALLEL_FOR_LOOP
       for(int ss=0;ss<osites;ss++){
 	for(int si=0;si<Nsimd;si++){