By Eric Martyn and John Morris STEPHENVILLE, Newfoundland (Reuters) -Powerful storm Fiona ripped into eastern Canada on Saturday with hurricane-force winds, forcing evacuations, knocking down trees and powerlines, and reducing many homes on the coast to “just a pile of rubble in the ocean.” The U.S. National Hurricane Center (NHC) said the center of the storm, downgraded to Post-Tropical Cyclone Fiona, was now in the Gulf of St. Lawrence after racing through Nova Scotia. After taking its toll on Nova Scotia and Prince Edward Island (PEI), the storm battered Newfoundland and Eastern Quebec, but…