Fix issue where subject input might get filled with "null" string (IE8)

Aleksander Machniak

2013-11-21 b7fb20af3a5c98f291204befdb616fdf5daa22fb

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-- Updates from version 0.8
 
ALTER TABLE `cache` DROP COLUMN `cache_id`;
ALTER TABLE `users` DROP COLUMN `alias`;
ALTER TABLE `identities` ADD INDEX `email_identities_index` (`email`, `del`);