Add table requirements

Author: LyzardKing

z-lib/article.latex

@@ -227,7 +227,8 @@ $if(highlighting-macros)$
 $highlighting-macros$
 $endif$
 $if(tables)$
-\usepackage{longtable,booktabs}
+\usepackage{longtable,booktabs,array}
+\usepackage{calc} % for calculating minipage widths
 $if(beamer)$
 \usepackage{caption}
 % These lines are needed to make table captions work with longtable: