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/text.h

@@ -45,6 +45,7 @@ std::string commify (const std::string&);
 std::string lowerCase (const std::string&);
 std::string upperCase (const std::string&);
 const char* optionalBlankLine ();
+void guess (const std::string&, std::vector<std::string>&, std::string&);
 
 #endif
 ////////////////////////////////////////////////////////////////////////////////