VANCOUVER - Telus announced today that it will become Canada's largest income trust next year, assuming shareholders approve.After its major announcement last week that the company will spend $600 million upgrading its network, the western telco's board of directors unanimously approved the proposal from Telus management to reorganize the publicly trade company into an income trust fund. It will be the largest income trust (for now, unless BCE decides to go the same route sometime in the future, as has been speculated).Initial distributions are anticipated to be in the range of $3.90 to $4.10 per unit on annualized basis, says...