Code improvements and fixes (mostly unused variables and methods)

Aleksander Machniak

2014-11-16 9e4246d9571481fe7b80227b1e23dc013771c5af

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-- Updates from version 0.4-beta
 
ALTER TABLE `users` CHANGE `last_login` `last_login` datetime DEFAULT NULL;
UPDATE `users` SET `last_login` = NULL WHERE `last_login` = '1000-01-01 00:00:00';