Enhancement - color

- Color routines are now table driven and much smaller.
- Implemented Text::guessColor.

src/color.h

@@ -50,6 +50,7 @@ namespace Text
   std::string colorize (color, color, const std::string& string);
   std::string colorize (color, color);
   std::string colorize ();
+  std::string guessColor (const std::string&);
 }
 
 #endif