LA Times: A frayed copy of “Don Quixote” was tucked under the front seat of Roberto Oliveros’ battered white truck as he sallied forth through the fast-changing plains of central Spain. Where the addled Cervantes hero tilted at windmills, Oliveros and his environmentalist friends see another towering enemy dotting this La Mancha landscape: construction cranes. An unbridled building boom, which first turned much of Spain’s once captivating coastline into a mile-wide belt of shopping …