Add operator<< support for TimeMap

opm/parser/eclipse/EclipseState/Schedule/TimeMap.hpp

@@ -27,6 +27,7 @@
 #include <ctime>
 #include <map>
 #include <utility>
+#include <iostream>
 
 #include <stddef.h>
 
@@ -99,6 +100,9 @@ namespace Opm {
         bool m_skiprest = false;
         std::size_t m_restart_offset = 0;
     };
+
+std::ostream& operator<<(std::ostream& stream, const TimeMap& tm);
+
 }