By Carlos Seijas Meneses Caracas, Jan 24 (EFE).- In the classroom, Lourdes Villarreal, a 56-year-old Venezuelan professor, teaches Performing Arts and Spanish. At home, she cuts, dries, straightens and tints hair, along with baking cakes, all to augment her scanty income as a teacher, a problem that has sparked many protests by the teachers’ union …