UDAs - User Defined Attributes

- Added support for named allowable values.

src/columns/ColUDA.h

@@ -41,9 +41,13 @@ public:
   ColumnUDA ();
   ~ColumnUDA ();
 
+  bool validate (std::string&);
   void measure (Task&, int&, int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
 
+public:
+  std::vector <std::string> _values;
+
 private:
   bool _hyphenate;
 };