http://www.vidaextra.com/estrategia/estas-son-todas-las-novedades-de-la-alpha-21-de-0-a-d-el-age-of-empires-gratuito-y-open-source
thank you again @Jarkendia
he translates the announcement (A21) to Spanish. In order to bring the game to more people.
I now he is lying he said about that he created the building in 0 A.D.
He want be succesful with the mod and try to be official and may be selling the mod.