Removed "using namespace std" statements from header files in EO -- "std::" identifier were added where necessary.

eo/tutorial/ParadisEO/Lesson1/IslandBitEA.cpp

@@ -5,6 +5,8 @@ typedef eoBit <double> Indi;	// A bitstring with fitness double
 
 #include "binary_value.h"
 
+using namespace std;
+
 void main_function(int argc, char ** argv) {
   
   // Some parameters ...

eo/tutorial/ParadisEO/Lesson1/IslandBitEA1.cpp

@@ -5,6 +5,8 @@ typedef eoBit <double> Indi;	// A bitstring with fitness double
 
 #include "binary_value.h"
 
+using namespace std;
+
 void main_function(int argc, char ** argv) {
   
   // Some parameters ...

eo/tutorial/ParadisEO/Lesson1/IslandBitEA2.cpp

@@ -5,6 +5,8 @@ typedef eoBit <double> Indi;	// A bitstring with fitness double
 
 #include "binary_value.h"
 
+using namespace std;
+
 void main_function(int argc, char ** argv) {
   
   // Some parameters ...

eo/tutorial/ParadisEO/Lesson1/binary_value.h

@@ -7,7 +7,7 @@
     @param _chrom A binary chromosome 
 */
 // INIT
-double binary_value(const vector<bool>& _chrom)
+double binary_value(const std::vector<bool>& _chrom)
 {
   double sum = 0;
   for (unsigned i = 0; i < _chrom.size(); i++)