Please fix typos in venue names

[Rafal Luzynski]

Hello,

Please fix the typos in the venue names at http://flock2016.sched.org/ :

"Picaso" => "Picasso"
"Rembrant" => "Rembrandt"

grep to find all occurrences. Also please do the same fix on other
servers if the same typos occur.

Thanks,

Rafal