Big news in the D.C. blogosphere! Jason Samenow of our favorite independent D.C. weather blog, CapitalWeather.com, just posted an announcement that his web site has been bought by partnered up with the washingtonpost.com. After nearly four years operating as an independent Web site, we are thrilled to announce that we will join washingtonpost.com tomorrow, January 8. CapitalWeather.com will officially become washingtonpost.com’s “Capital Weather Gang” blog. As soon as our area on washingtonpost.com launches, CapitalWeather.com will…