Feature - 256-color support

- Integrated new Color object into task.
- Debugging needed - the cyan, green, and yellow colors are mixed up!

src/Color.cpp

@@ -471,6 +471,15 @@ std::string Color::colorize (const std::string& input, const std::string& spec)
   return c.colorize (input);
 }
 
+////////////////////////////////////////////////////////////////////////////////
+bool Color::nontrivial ()
+{
+  if (value != (_COLOR_NOFG | _COLOR_NOBG))
+    return true;
+
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 int Color::find (const std::string& input)
 {