remove final class from db drivers

system/database/databases/mpdo.php

@@ -15,7 +15,7 @@ use Phacil\Framework\Interfaces\Databases;
  * Alternative PDO MySQL connection method.
  * 
  * @package Phacil\Framework\Databases */
-final class mPDO implements Databases {
+class mPDO implements Databases {
 	/**
 	 * 
 	 * @var PDO

system/database/databases/sqlite3_db.php

@@ -12,7 +12,7 @@ use Phacil\Framework\Interfaces\Databases;
 use \SQLite3;
 use \stdClass;
 
-final class Sqlite3_db implements Databases {
+class Sqlite3_db implements Databases {
     /**
      * 
      * @var SQLite3

system/database/databases/sqlsrv.php

@@ -10,7 +10,7 @@ namespace Phacil\Framework\Databases;
 
 use Phacil\Framework\Interfaces\Databases;
 
-final class SQLSRV implements Databases {
+class SQLSRV implements Databases {
     /**
      * 
      * @var resource

system/database/databases/sqlsrvpdo.php

@@ -11,7 +11,7 @@ namespace Phacil\Framework\Databases;
 use \PDO as PDONative;
 use Phacil\Framework\Interfaces\Databases;
 
-final class sqlsrvPDO implements Databases {
+class sqlsrvPDO implements Databases {
     /**
      * 
      * @var PDONative