Added an option to read input from a file.

futil.h

@@ -0,0 +1,15 @@
+#ifndef FUTIL_H
+#define FUTIL_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#ifndef FUTIL_READ_SIZE
+#define FUTIL_READ_SIZE 2097152 //Default here is 2MiB
+#endif
+
+int ReadAllString(const char*, char**, size_t*);
+
+#endif