Changed: Bio are more readable
Added: Sponsors, Speakers and Orga members  are now sorted according to their name.
Added: Added nofollow to non sponsors/orga links
Removed: feed.xml which is not needed
Added:  image for talk
Added: proper speakers's photo for home
Added: Photo of the first speaker in case there are several
Added:  A link for each speaker if they're several for a talk
Changed: Additions to schedule and speaker list
Changed: Additions to schedule and speaker list