Polish docs for HTML, Inflector, Language, Number, Path, Security and Smiley helpers

Also fixed a DB_cache bug introduced in previous commit and removed an unused parameter in a smiley helper
diff --git a/system/helpers/html_helper.php b/system/helpers/html_helper.php
index 404392f..fa49f7d 100644
--- a/system/helpers/html_helper.php
+++ b/system/helpers/html_helper.php
@@ -157,12 +157,12 @@
 	/**
 	 * Generates HTML BR tags based on number supplied
 	 *
-	 * @param	int
+	 * @param	int	$count	Number of times to repeat the tag
 	 * @return	string
 	 */
-	function br($num = 1)
+	function br($count = 1)
 	{
-		return str_repeat('<br />', $num);
+		return str_repeat('<br />', $count);
 	}
 }