Ah, Mexico: the land of margaritas and sunshine. At least that's what comes to mind for some of us here at Tracy Mazda.  When Mazda execs think of Mexico, however, they think of money and manufacturing. The Japanese automaker and Sumitomo Corporation have teamed up to form the new Mazda Motor Manufacturing de Mexico S.A. de C.V. Plant workers will build new 2014 versions of the Mazda2 and Mazda3 models for South American markets. The factory will be located in Salamanca, Guanajuato, and the cars will be the same as the Mazda Axela and Mazda Demio models…