added background image to dmg alligned in json specs
added background image to dmg alligned in json specs

OpenNewsLabs/autoEdit_2,OpenNewsLabs/autoEdit_2,OpenNewsLabs/autoEdit_2,OpenNewsLabs/autoEdit_2,OpenNewsLabs/autoEdit_2,OpenNewsLabs/autoEdit_2,OpenNewsLabs/autoEdit_2,OpenNewsLabs/autoEdit_2