Merge pull request #4 from andypiper/gh-pages

Minor cleanups and additional Sandbox info
Fixed issue #3: meta descriptions need completing
Fixed issue #2 - No description of "M2M" on the main page
adding scott's input re: MQTT
Analytics tracker.
Include what's needed for nice Google+ previews
adding sitemaps
Adding Google +1 button
Fixing link to the Koneki forum
adding the Google +1 button on all the pages
Updating events section.
updating upcoming events
Adding a list of members in the Community section
adding a robots.txt
update upcoming events
link to actual Mihini website
Fix link to Paho downloads

The recent refresh of the Paho website broke one of the links.
Also make Mihini "current"