It's the perfect loophole for Christmas lovers - and especially for those who love Halloween too.  The Nightmare before Christmas is the absolute perfect marriage between the two holidays. It's definitely a Christmas Movie (it's got Santa!) - or is it a Halloween movie (it was released in October!)? Either way, it's the one Christmas themed film that's not off limits in October, and we're ready to decorate for Halloween, Christmas style, with these awesome handmade Nightmare Before Christmas Decorations from Etsy. Decorating is a super important part of both Halloween and Christmas so why not just decorate once and…