Added readline support into CLI.

Supports scrolling through past commands,
and tab-completion for commands (no subcommands, sorry).
Requires libreadline package to build from now on!
for debian/ubuntu: apt-get install libreadline5-dev
Linux only, windows users shouldnt notice any difference.

--HG--
branch : trunk

src/game/Chat.h

@@ -73,7 +73,7 @@ class ChatHandler
         int ParseCommands(const char* text);
 
         virtual char const* GetName() const;
-
+        static ChatCommand* getCommandTable();
     protected:
         explicit ChatHandler() : m_session(NULL) {}      // for CLI subclass
 
@@ -89,8 +89,6 @@ class ChatHandler
         bool ShowHelpForCommand(ChatCommand *table, const char* cmd);
         bool ShowHelpForSubCommands(ChatCommand *table, char const* cmd, char const* subcmd);
 
-        ChatCommand* getCommandTable();
-
         bool HandleAccountCommand(const char* args);
         bool HandleAccountCreateCommand(const char* args);
         bool HandleAccountDeleteCommand(const char* args);