Stammtisch pages updated

Finally got around to some page updates. Some general updates on the Stammtische page and added information for the new East Valley Free Software Stammtisch.

The East Valley Free Software Stammtisch moved to Iguana Macks a couple of months ago. After having met in Tempe for over a decade, we moved a few miles east to Mesa. It's a good location and we've mostly had a good turnout. Sorry about December Brian :).