When I rolled out of bed Sunday morning, still tired (though exhilarated) from a wet, but killer, inaugural day of Boston Calling Music Festival, it was already clear that day two was off to a good start. The sun was peeking its sheepish head out from behind the clouds (where were you yesterday, bro?) and I didn’t have to put on galoshes and wool gloves to venture out to City Hall Plaza, so I was in business. As were the roughly 20,000 other people swarming the Plaza yesterday afternoon, the increase in attendance having skyrocketed with the improvement in the weather. (Where were you yesterday, bros?)