Made automatic version updates for 'Diaoul / Sick-Beard Subliminal' work properly. 

GitUpdateManager and SourceUpdateManager now update to 'Diaoul / Sick-Beard Subliminal' branch instead of 'midgetspy / Sick-Beard Master'.

Please note that WindowsUpdateManager still updates to midgetspy. But as far as i know there is no Windows binary build of Diaoul / Sick-Beard Subliminal anyway so that shouldn't be a problem for now.

Tested by starting with an old version and then click update in the screen top notification bar. It updated to the expected branch.