int is long, select column can be function, some fixes..

just to get it work.. needs improvement

ml_date.h

@@ -0,0 +1,17 @@
+
+#pragma once
+
+#include "clib/date.h"
+
+#include <string>
+#include <vector>
+
+
+long now();
+
+std::string date_to_string(const long datetime, const std::string format);
+
+long string_to_date(const std::string &datestr, const std::string &format);
+
+long add_to_date(const long datetime, const long quantity, const std::string &part);
+