Enhancement - all attribute modifiers working

- Implemented before, below, under, after, above, over.

src/Duration.cpp

@@ -39,6 +39,12 @@ Duration::Duration ()
 {
 }
 
+////////////////////////////////////////////////////////////////////////////////
+Duration::Duration (time_t input)
+{
+  mDays = input;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 Duration::Duration (const std::string& input)
 {