Updated Addon Support for 5.3.x

Remember...
- To copy to server folder the new dll included (IonicZlib.dll)
- To Insert the table 'addons' into 'characterdb' DataBase (data is
stored into Sql/Updates/CharacterDB/2013_03_28_addons.sql)

You're done. Now, you can use your addons and timer addon error won't
bother anymore... :)