remove USING_PART_OF_NAMESPACE_EIGEN, leaving it in Eigen2Support.

improve porting-Eigen2-to-3 docs

bench/BenchSparseUtil.h

@@ -6,7 +6,7 @@
 
 using namespace std;
 using namespace Eigen;
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 #ifndef SIZE
 #define SIZE 1024

bench/BenchUtil.h

@@ -6,7 +6,7 @@
 #include "BenchTimer.h"
 
 using namespace std;
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 #include <boost/preprocessor/repetition/enum_params.hpp>
 #include <boost/preprocessor/repetition.hpp>

bench/bench_sum.cpp

@@ -1,5 +1,5 @@
 #include <Eigen/Core>
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 using namespace std;
 
 int main() 

bench/benchmark.cpp

@@ -6,7 +6,7 @@
 #endif
 
 using namespace std;
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 #ifndef REPEAT
 #define REPEAT 40000000

bench/benchmarkSlice.cpp

@@ -3,7 +3,7 @@
 #include <Eigen/Array>
 
 using namespace std;
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 #ifndef REPEAT
 #define REPEAT 10000

bench/benchmarkX.cpp

@@ -2,7 +2,7 @@
 #include <Eigen/Core>
 
 using namespace std;
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 #ifndef MATTYPE
 #define MATTYPE MatrixXLd

bench/benchmarkXcwise.cpp

@@ -3,7 +3,7 @@
 #include <Eigen/Core>
 
 using namespace std;
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 #ifndef VECTYPE
 #define VECTYPE VectorXLd

bench/vdw_new.cpp

@@ -1,6 +1,6 @@
 #include <Eigen/Array>
 
-USING_PART_OF_NAMESPACE_EIGEN
+using namespace Eigen;
 
 #ifndef SCALAR
 #define SCALAR float