A weekend trip to Colorado might have been just what the doctor ordered for the oft offensively-challenged Washington Nationals, who appear to be breaking out of their offensive doldrums just in time for the second leg of their make-or-break 13 game road trip. After a 4-2 win Friday and an 8-0 thrashing Saturday night, the Nats completed the three game sweep by pounding the Rockies 9-2 yesterday. More importantly than winning (and sweeping) their first…