Initial commit

Eigen3/doc/snippets/Map_inner_stride.cpp

@@ -0,0 +1,5 @@
+int array[12];
+for(int i = 0; i < 12; ++i) array[i] = i;
+cout << Map<VectorXi, 0, InnerStride<2> >
+         (array, 6) // the inner stride has already been passed as template parameter
+     << endl;