Tis the season for wrapping gifts, baking cookies…and transforming your home into a holiday masterpiece. Whether you drape your house in lights, put out lots of inflatable characters or create a one-of-a-kind holiday scene on your front yard, we want to see it. Starting today, Patch is hosting its first annual Westchester Holiday Decorations Contest. Think your house has the best holiday décor in the County? Now's your chance to show it. Between now and Dec. 20 at 5 p.m., upload one photo of the outside of your house to this article. All the photos submitted will be posted on this article, so…