By THÉRÈSE MARGOLIS     It’s often been said that one man’s nightmare is another man’s dream, but in the case of alebrijes, one man’s nightmare became his own dream-come-true path to success. Back in the early 1930s, Pedro Linares, a poor Mixe paper maché artisan in the remote Oaxacan village of San Martín Tilcajete was in the throws of illness in