Added get_dir_file_info(), get_file_info(), and get_mime_by_extension() to the File Helper.

Changed ( ! condition) into (! condition) within the code
diff --git a/system/helpers/security_helper.php b/system/helpers/security_helper.php
index 7552fd8..edb6ebb 100644
--- a/system/helpers/security_helper.php
+++ b/system/helpers/security_helper.php
@@ -59,9 +59,9 @@
 	{

 		if ($type == 'sha1')

 		{

-			if ( ! function_exists('sha1'))

+			if (! function_exists('sha1'))

 			{

-				if ( ! function_exists('mhash'))

+				if (! function_exists('mhash'))

 				{	

 					require_once(BASEPATH.'libraries/Sha1'.EXT);

 					$SH = new CI_SHA;