now compiling under g++ 4.5, with libreadline6

pub/src/curve.cpp

@@ -13,6 +13,8 @@
 #include <math.h>
 #include <fcntl.h>
 #include <lmmin.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 
 #include <ask_simple_value.h>
 #include <readln.h>

pub/src/dualplot.cpp

@@ -11,6 +11,8 @@
 #include <iostream>
 #include <math.h>
 #include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 #include <boost/format.hpp>
 
 #include "mystd.h"