Theme related constants

Mainly newfounded constants (not common used0

HTMLTAG $htmlTag = "<html".(defined("TEXTDIRECTION") ? " dir='".TEXTDIRECTION."'" : "").(defined("CORE_LC") ? " lang="".CORE_LC.""" : "").">";
echo (defined('HTMLTAG') ? str_replace('THEME_LAYOUT', THEME_LAYOUT, HTMLTAG) : $htmlTag)."n";