CLI2: Aliases captured.

- CLI2::alias now captures all alias definitions from Context::Config.

src/CLI2.h

@@ -77,9 +77,7 @@ public:
 public:
   CLI2 ();
   ~CLI2 ();
-/*
   void alias (const std::string&, const std::string&);
-*/
   void entity (const std::string&, const std::string&);
 /*
   void initialize (int, const char**);
@@ -144,8 +142,8 @@ private:
 
 public:
   std::multimap <std::string, std::string> _entities;
-/*
   std::map <std::string, std::string>      _aliases;
+/*
   std::vector <std::string>                _original_args;
   std::vector <A>                          _args;