start working on User and Group classes

- User and Group has been moved to 'models' directory
- removed UserPass struct (passwords fields were put to User struct)
not working yet, we need support for binary blobs in morm

winixd/core/groups.h

@@ -37,7 +37,7 @@
 
 #include <map>
 
-#include "group.h"
+#include "models/group.h"
 #include "ugcontainer.h"
 #include "db/db.h"
 #include "winixmodel.h"