google map simplistic example code

I'm really proud of the work I've done on http://jpporchfest.org over the past few years, and I might be helping Brookline get their stuff together- for their first year they might not want to be as high tech as we've been, but I was surprised that I couldn't easily find the work I did to help Plumfest (on Plum Island) assemble their map, so I'm putting this here for future reference: http://kirkdev.alienbill.com/plum2015/