Changing super username

[anonymous-matomo-user]

Please allow changing super username and super user alias.
"Your username cannot be changed."
"The Super User alias cannot be changed."

I now know it can be done changing it in config.ini.php but it would be more user friendly if this could be done using the GUI:

[mattab]

This was fixed in 2.1.0 release: http://piwik.org/changelog/piwik-2-1-0/