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/functions/passwd.cpp

@@ -110,10 +110,11 @@ bool result = false;
 
 	if( puser )
 	{
-		up.has_pass = true;
-		up.pass = new_password;
-		system->crypt.PassHashCrypt(up);
-		result = (db->ChangeUserPass(user_id, up) == WINIX_ERR_OK);
+		puser->has_pass = true;
+		puser->password = new_password;
+		system->crypt.PassHashCrypt(*puser);
+
+		result = puser->update();
 
 		if( result )
 			log << log2 << "Passwd: password for user " << puser->name << " has been changed" << logend;