simplified ddspin/iddspin/cellgfxdist, replaced cellrelmatrix with adj/iadj

nonisotropic.cpp

@@ -821,6 +821,8 @@ EX namespace nilv {
       return child;
       }
 
+    transmatrix adj(cell *c, int i) override { return adjmatrix(i); }
+  
     virtual transmatrix relative_matrix(heptagon *h2, heptagon *h1) override { 
       for(int a=0; a<S7; a++) if(h2 == h1->move(a)) return adjmatrix(a);
       return nisot::translate(mvec_to_point(coords[h1].inverse() * coords[h2]));