NEW YORK (TheStreet) -- RATINGS CHANGES Lululemon Athletica (LULU) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: LULU Ratings Report. Men's Wearhouse (MW) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: MW Ratings Report. Must Read: Warren Buffett's Top 10 Dividend Stocks Perfect World (PWRD) was downgraded...