Merge pull request #1260 from kwilczynski/master

Add details about accommodations, etc.
Merge pull request #1261 from kwilczynski/master

Add Michael Ducy from Chef.
Merge pull request #1262 from kwilczynski/master

Small fix.
[warsaw-2014] update program and speakers info
Merge pull request #1263 from liku/master

[warsaw-2014] update program and speakers info