Feature - 256-color support

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

src/main.h

@@ -112,7 +112,7 @@ void validSortColumns (const std::vector <std::string>&, const std::vector <std:
 
 // rules.cpp
 void initializeColorRules ();
-void autoColorize (Task&, Text::color&, Text::color&);
+void autoColorize (Task&, Color&);
 std::string colorizeHeader (const std::string&);
 std::string colorizeMessage (const std::string&);
 std::string colorizeFootnote (const std::string&);