fix most of the doxygen warnings

eo/src/eoGenContinue.h

@@ -86,11 +86,17 @@ public:
   
   virtual std::string className(void) const { return "eoGenContinue"; }
 
+  /** Read from a stream
+   * @param __is the istream to read from
+   */
   void readFrom (std :: istream & __is) {
     
     __is >> thisGeneration; /* Loading the number of generations counted */
   }
   
+  /** Print on a stream
+   * @param __os the ostream to print on
+   */
   void printOn (std :: ostream & __os) const {
     
     __os << thisGeneration << std :: endl; /* Saving the number of generations counted */