Updated documentation to give proper include file in doxygen and define a module selectors

Also added a load(stream) and save(stream) to eoState

eo/src/utils/selectors.h

@@ -42,6 +42,10 @@
 
 #include "eoRNG.h"
 
+/**
+\defgroup selectors
+*/
+
 template <class EOT>
 bool minimizing_fitness()
 {