Website content update -- T-shirt photos

The latest stage of archiving and sharing information about PrinceCons past has been to add photos of the t-shirts for conventions where they're available! They can be found on a convention page, underneath the staff listing (for now, further formatting edit may be to come :-).

One thing you'll note is that in many years, the conbook cover art is the same as the t-shirt art. We've included both the cover image and the photo of the t-shirt in these cases because seeing the base color of the t-shirt is interesting! (at least to us)

We currently have photos of all cons, with the exception of 1-15, 20-21, and 23-26. At the moment, we're not entirely certain at which convention t-shirts became a thing (we know they go as far back as 9) and it's unclear whether any from prior to 16 are extant.