Reorganise of file naming

lib/stencil/Lebesgue.h

@@ -0,0 +1,29 @@
+#ifndef GRID_LEBESGUE_H
+#define GRID_LEBESGUE_H
+
+#include<vector>
+
+// Lebesgue, Morton, Z-graph ordering assistance
+namespace Grid {
+  
+  class LebesgueOrder { 
+  public:
+
+    static int UseLebesgueOrder;
+
+    typedef uint32_t IndexInteger;
+
+    inline IndexInteger Reorder(IndexInteger ss) { 
+      return UseLebesgueOrder ? _LebesgueReorder[ss] : ss; 
+    };
+
+    IndexInteger alignup(IndexInteger n);
+
+    LebesgueOrder(GridBase *grid);
+
+  private:
+    std::vector<IndexInteger> _LebesgueReorder;
+
+  };    
+}
+#endif