When I talk to James Mercer ahead of the release of ‘Port Of Morrow’, we barely mention The Shins. We don't go into detail about the new album, and we barely touch on the end of their deal with Sub Pop. What we talk about, for the most part, is the gap between 2007's ‘Wincing The Night Away’, and the new record. Two important things happened in the intervening years: Heath Ledger died, and Mercer founded Broken Bells with producer Brian Burton (aka Danger Mouse). As he explains it, one thing is inextricably linked to the other, and those things…