NY Post Page Six The Kelly Gang rides again! On Monday — St. Patrick's night — the "Gang" will take over media mecca Michael's to honor U.S. Army Sgt. Ryan Kelly and raise money for the Wounded Warrior Project, which helps soldiers maimed in Iraq and Afghanistan. Sgt. Kelly lost his right leg below the knee in a bomb blast in Iraq and has since been trying to help other GIs in similar straits. The Kelly Gang is named for legendary Australian outlaw Ned Kelly, but its modern-d