Tributes have been paid to Australia's former prime minister Gough Whitlam who died on Tuesday at the age of 98. Tony Abbott, the country's current PM, said he was a "giant of his time" while opposition leader Bill Shorten said he "changed the lives of a generation". Mr Whitlam ended 23 years of conservative rule in 1972 and introduced a host of reforms including establishing universal health care. He was sacked by the governor-general in 1975 after a constitutional crisis. "He united the Australian Labor Party, won two elections and seemed, in so many ways, larger than life," Mr Abbott said in a statement. He instructed flags to fly at half-mast…