By Mark Lamport-Stokes AUGUSTA, Georgia (Reuters) - This week's Masters always had the makings for being something extra special and it lived up to expectations on Thursday as reigning champion Jordan Spieth seized a two-shot lead after the opening round. The American's love affair with the challenging Augusta National layout continued in flawless style as he fired a six-under-par 66 to storm to the top of a high-quality leaderboard in the first of the year's four major championships. Bidding to become only the fourth player to claim back-to-back Masters victories, world number two Spieth took advantage of relatively calm morning conditions before coping superbly with tricky gusting winds as he kept his card bogey-free. More...