Enhancements - Cmd object

- New Cmd object to handle localized commands, customReports and general
  command parsing.
- Localized new Subst methods.
- Relocate guess method from parse.cpp to text.cpp.
- Converted Att object to use new valid/parse scheme.
- Unit tests for Cmd object.
- Fixed att.t.cpp unit tests.

src/Record.cpp

@@ -95,8 +95,9 @@ void Record::parse (const std::string& input)
 
     Nibbler nl (line);
     Att a;
-    while (!nl.depleted () && a.parse (nl))
+    while (!nl.depleted ())
     {
+      a.parse (nl);
       (*this)[a.name ()] = a;
       nl.skip (' ');
     }