Added function "is_superadmin" in auth library and improved other functions.

Till Brehm

2014-08-13 19b5e01da02aa2115ee802cf2e43a7f3e58f4eac

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<?php
$wb["description_txt"] = 'Description';
$wb["name_txt"] = 'Group';
$wb["name_err"] = 'Group must be min 1, max 30 Chars.';
?>