It’s been a long time since U2 really conjured anything other than annoyance. It’s been nearly two decades since All That You Can’t Leave Behind rekindled some of their initial spark and the group have spent the better part of that time grandstanding, bungling misjudged album launches and releasing music that limps into obscurity months after release. So with the old vanguard falling by the wayside, it’s high time that somebody took up the position and started leading the charge. Shearwater, the brainchild of multi instrumentalist and lead vocalist Jonathan Meiburg, have spent the guts of the last decade finely…