remove USING_PART_OF_NAMESPACE_EIGEN, leaving it in Eigen2Support.

improve porting-Eigen2-to-3 docs

doc/examples/Tutorial_simple_example_dynamic_size.cpp

@@ -1,8 +1,7 @@
 #include <Eigen/Core>
 #include <iostream>
 
-// import most common Eigen types 
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 int main(int, char *[])
 {

doc/examples/Tutorial_simple_example_fixed_size.cpp

@@ -1,8 +1,7 @@
 #include <Eigen/Core>
 #include <iostream>
 
-// import most common Eigen types 
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 int main(int, char *[])
 {

doc/examples/class_Block.cpp

@@ -1,6 +1,6 @@
 #include <Eigen/Core>
 #include <iostream>
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 using namespace std;
 
 template<typename Derived>

doc/examples/class_CwiseBinaryOp.cpp

@@ -1,6 +1,6 @@
 #include <Eigen/Core>
 #include <iostream>
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 using namespace std;
 
 // define a custom template binary functor

doc/examples/class_CwiseUnaryOp.cpp

@@ -1,6 +1,6 @@
 #include <Eigen/Core>
 #include <iostream>
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 using namespace std;
 
 // define a custom template unary functor

doc/examples/class_FixedBlock.cpp

@@ -1,6 +1,6 @@
 #include <Eigen/Core>
 #include <iostream>
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 using namespace std;
 
 template<typename Derived>

doc/examples/class_FixedVectorBlock.cpp

@@ -1,6 +1,6 @@
 #include <Eigen/Core>
 #include <iostream>
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 using namespace std;
 
 template<typename Derived>

doc/examples/class_VectorBlock.cpp

@@ -1,6 +1,6 @@
 #include <Eigen/Core>
 #include <iostream>
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 using namespace std;
 
 template<typename Derived>