Domain wall fermions now invert ; have the basis set up for

Tanh/Zolo * (Cayley/PartFrac/ContFrac) * (Mobius/Shamir/Wilson)
Approx        Representation               Kernel.

All are done with space-time taking part in checkerboarding, Ls uncheckerboarded

Have only so far tested the Domain Wall limit of mobius, and at that only checked
that it
i)  Inverts
ii) 5dim DW == Ls copies of 4dim D2
iii) MeeInv Mee == 1
iv) Meo+Mee+Moe+Moo == M unprec.
v) MpcDagMpc is hermitan
vi) Mdag is the adjoint of M between stochastic vectors.

That said, the RB schur solve, RB MpcDagMpc solve, Unprec solve
all converge and the true residual becomes small; so pretty good tests.

lib/qcd/SpaceTimeGrid.cc

@@ -0,0 +1,52 @@
+#include <Grid.h>
+
+namespace Grid { 
+  namespace QCD {
+
+/////////////////////////////////////////////////////////////////
+// Public interface
+/////////////////////////////////////////////////////////////////
+GridCartesian *SpaceTimeGrid::makeFourDimGrid(const std::vector<int> & latt,const std::vector<int> &simd,const std::vector<int> &mpi)
+{
+  return new GridCartesian(latt,simd,mpi); 
+}
+GridRedBlackCartesian *SpaceTimeGrid::makeFourDimRedBlackGrid(const GridCartesian *FourDimGrid)
+{
+  return new GridRedBlackCartesian(FourDimGrid); 
+}
+
+GridCartesian         *SpaceTimeGrid::makeFiveDimGrid(int Ls,const GridCartesian *FourDimGrid)
+{
+  int N4=FourDimGrid->_ndimension;
+
+  std::vector<int> latt5(1,Ls);
+  std::vector<int> simd5(1,1);
+  std::vector<int>  mpi5(1,1);
+  
+  for(int d=0;d<N4;d++){
+    latt5.push_back(FourDimGrid->_fdimensions[d]);
+    simd5.push_back(FourDimGrid->_simd_layout[d]);
+     mpi5.push_back(FourDimGrid->_processors[d]);
+  }
+  return new GridCartesian(latt5,simd5,mpi5); 
+}
+
+GridRedBlackCartesian *SpaceTimeGrid::makeFiveDimRedBlackGrid(int Ls,const GridCartesian *FourDimGrid)
+{
+  int N4=FourDimGrid->_ndimension;
+  int cbd=1;
+  std::vector<int> latt5(1,Ls);
+  std::vector<int> simd5(1,1);
+  std::vector<int>  mpi5(1,1);
+  std::vector<int>   cb5(1,0);
+    
+  for(int d=0;d<N4;d++){
+    latt5.push_back(FourDimGrid->_fdimensions[d]);
+    simd5.push_back(FourDimGrid->_simd_layout[d]);
+     mpi5.push_back(FourDimGrid->_processors[d]);
+      cb5.push_back(  1);
+    }
+  return new GridRedBlackCartesian(latt5,simd5,mpi5,cb5,cbd); 
+}
+
+}}