Markdown.pl: allow some overlooked table attributes

For %cellhalign allow the overlooked 'char' and 'charoff' attributes.

For table allow the overlooked 'frame' and 'rules' attributes.

For table, tr, th and td allow the 'bgcolor' attribute.

Signed-off-by: Kyle J. McKay <mackyle@gmail.com>

Markdown.pl

@@ -3379,8 +3379,8 @@ BEGIN {
 	'basefont' => { map({$_ => 1} qw(color face size)) },
 	'br' => { map({$_ => 1} qw(clear)) },
 	'caption' => { map({$_ => 1} qw(align)) },
-	'col' => { map({$_ => 1} qw(align span width valign)) },
-	'colgroup' => { map({$_ => 1} qw(align span width valign)) },
+	'col' => { map({$_ => 1} qw(align char charoff span width valign)) },
+	'colgroup' => { map({$_ => 1} qw(align char charoff span width valign)) },
 	'dir' => { map({$_ => 1} qw(compact)) },
 	'div' => { map({$_ => 1} qw(align)) },
 	'dl' => { map({$_ => 1} qw(compact)) },
@@ -3400,13 +3400,13 @@ BEGIN {
 	'ol' => { map({$_ => 1} qw(compact start type)) },
 	'p' => { map({$_ => 1} qw(align)) },
 	'pre' => { map({$_ => 1} qw(width)) },
-	'table' => { map({$_ => 1} qw(align border cellpadding cellspacing summary width)) },
-	'tbody' => { map({$_ => 1} qw(align valign)) },
-	'tfoot' => { map({$_ => 1} qw(align valign)) },
-	'thead' => { map({$_ => 1} qw(align valign)) },
-	'td' => { map({$_ => 1} qw(align colspan height nowrap rowspan valign width)) },
-	'th' => { map({$_ => 1} qw(align colspan height nowrap rowspan valign width)) },
-	'tr' => { map({$_ => 1} qw(align valign)) },
+	'table' => { map({$_ => 1} qw(align bgcolor border cellpadding cellspacing frame rules summary width)) },
+	'tbody' => { map({$_ => 1} qw(align char charoff valign)) },
+	'tfoot' => { map({$_ => 1} qw(align char charoff valign)) },
+	'thead' => { map({$_ => 1} qw(align char charoff valign)) },
+	'td' => { map({$_ => 1} qw(align bgcolor char charoff colspan height nowrap rowspan valign width)) },
+	'th' => { map({$_ => 1} qw(align bgcolor char charoff colspan height nowrap rowspan valign width)) },
+	'tr' => { map({$_ => 1} qw(align bgcolor char charoff valign)) },
 	'ul' => { map({$_ => 1} qw(compact type)) }
     );
     %tagmt = map({$_ => 1} qw(area basefont br col hr img));