Added John Willis' talk to London 2013
Added Florentin Rauds talk to London 2013 - still needs a bio
Added Flo's bio to London 2013
Added Bernd Erk's talk to London 2013
Added John Willis's bio to his talk for London 2013
Merge pull request #548 from stack72/master

NEEDS JOHN WILLIS'S BIO BEFORE MERGING - PLEASE DONT MERGE YET