fixed: UGContainer<Type> used a std::vector<Type> and when a new item was inserted

then current iterators (and pointers) were invalidated
         now we are using std::vector<Type*>
         this caused some crashes when a new user was added by 'adduser' winix function
added:   plugin 'export' is able to upload files on a remote server now
         (not finished yet)
changed: Thumb class is now called: Image
         and we are able to resize images too
         (some new options in the config and in mount points)
added:   some new plugin messages



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@764 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/plugin.h

@@ -156,6 +156,8 @@ public:
 	bool HasPlugin(const wchar_t * name);
 	bool HasPlugin(const std::wstring & name);
 
+	bool HasMessage(int message);
+
 	void Call(int message);
 	void Call(int message, void * p1_);
 	void Call(int message, void * p1_, void * p2_);