It’s now been about three months since Hurricanes Irma and Maria devastated parts of the Caribbean, but the swath of destruction was selective. Some islands were virtually destroyed. Almost every building on Barbuda, for example, was knocked down, while on Antigua, almost next door, the damage was minor. Generally, the southern Caribbean, from Martinique on down, escaped undamaged, while Puerto Rico and the nearby U.S. and British Virgin Islands took a big hit. But that was then. What’s open now? Here’s an island-by-island update from the Travel section of The New York Times, reporting on the recovery situation and when…