ATHENS, March 5 (Reuters) - A Greek railway employee was jailed on Sunday pending trial over a deadly train crash that killed at least 57 people, as Greeks seethed with anger over the worst rail disaster in living memory. "After protests over the past three days across the country, some 10,000 people gathered in an Athens square on Sunday to express sympathy for the lives lost and to demand better safety standards on the rail network. See here for a complete list of exchanges and delays