Use C++11 unordered_{map,set} instead of boost's

dynare++/parser/cc/tree.hh

@@ -6,15 +6,15 @@
 #include <vector>
 #include <set>
 #include <map>
-#include <boost/unordered_map.hpp>
-#include <boost/unordered_set.hpp>
+#include <unordered_map>
+#include <unordered_set>
 #include <cstdio>
 
 namespace ogp
 {
 
-  using boost::unordered_set;
-  using boost::unordered_map;
+  using std::unordered_set;
+  using std::unordered_map;
   using std::vector;
   using std::set;
   using std::map;

dynare++/src/dynare_model.cc

@@ -13,6 +13,7 @@
 #include <string>
 #include <cmath>
 #include <climits>
+#include <ostream>
 
 using namespace ogdyn;
 

dynare++/src/dynare_model.hh

@@ -13,11 +13,11 @@
 #include "GeneralMatrix.hh"
 
 #include <map>
-#include <boost/unordered_set.hpp>
+#include <unordered_set>
 
 namespace ogdyn
 {
-  using boost::unordered_set;
+  using std::unordered_set;
   using std::map;
 
   /** This represents an interval in a string by the pair of

dynare++/src/planner_builder.hh

@@ -8,7 +8,7 @@
 namespace ogdyn
 {
 
-  using boost::unordered_set;
+  using std::unordered_set;
   using std::map;
   using std::vector;