Removed broken logo upload. Needs to be reimplemented from scratch.

Till Brehm

2016-04-20 fe39f6bd20cba56b78e5e80ef4b6d47c8a2e4917

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ALTER TABLE  `sys_session` CHANGE  `session_id`  `session_id` VARCHAR( 64 ) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;