Photo by Jonathan Wiggs/The Boston Globe via Getty Images The preseason is coming! Happy Friday, folks! It’s a big Friday too — the last one without recent hockey games to discuss until sometime in the spring (ideally). Sure, they’re only preseason games, but who doesn’t love to argue about exhibition games that will feature rosters that are 60-70% non-NHL players?! Still, beggars can’t be choosers, and it’s better to have the preseason than to have nothing at all. The Bruins will play the Flyers tomorrow night, with training camp rolling on today (and tomorrow, for the non-playing players). If you haven’t been able to follow training camp, here’s what things…