Minor Refactoring

- Added support for more type-specific checks of attribute values.
- Added support for more type-specific attribute rendering.
- Improved generalized methods for checking columns in a report.
- Added unit tests.
- Minor code cleanup.
- Added secret hidden feature for internal testing.

src/Duration.cpp

@@ -25,7 +25,6 @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 
-
 #define L10N                                           // Localization complete.
 
 #include <sstream>
@@ -401,6 +400,13 @@ void Duration::parse (const std::string& input)
   else
     _negative = false;
 
+  // If no units are provided, assume seconds.
+  if (n.depleted ())
+  {
+    _secs = (long) value;
+    return;
+  }
+
   std::string units;
   n.getUntilEOS (units);