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/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index f435c0b..f15983d 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -161,7 +161,7 @@
 	 */	

 	function trans_begin($test_mode = FALSE)

 	{

-		if ( ! $this->trans_enabled)

+		if (! $this->trans_enabled)

 		{

 			return TRUE;

 		}

@@ -192,7 +192,7 @@
 	 */	

 	function trans_commit()

 	{

-		if ( ! $this->trans_enabled)

+		if (! $this->trans_enabled)

 		{

 			return TRUE;

 		}

@@ -218,7 +218,7 @@
 	 */	

 	function trans_rollback()

 	{

-		if ( ! $this->trans_enabled)

+		if (! $this->trans_enabled)

 		{

 			return TRUE;

 		}