Fix link to Paho downloads

The recent refresh of the Paho website broke one of the links.
Also make Mihini "current"
Merge pull request #8 from andypiper/gh-pages

Fix a broken link
upcoming events update
fix issue #6
issue #405676 promote the M3DA sandbox server for Mihini
Merge pull request #9 from jvermillard/gh-pages

add m3da sandbox info
basic layout improvement.
added URL for the REST API endpoint
update bridge and cosm->xively
Merge pull request #10 from andypiper/fix-urls

update bridge and cosm->xively
removing old events
Greenhouse demo
adding Node components/ folder
add GA, update copyright, remove toastr
GA tracking for toggleRoof command
cleanup