Add new Media Partner: GazetaPraca.pl

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>
Merge pull request #1187 from kwilczynski/master

Add new Media Partner: GazetaPraca.pl
Added 1 proposal
Merge pull request #1188 from jbraeuer/master

Updated speaker's bio
Added 1 proposal
Merge pull request #1189 from jbraeuer/master

Added 1 proposal
Merge pull request #1190 from DevOpsDaysChicago/master

[chicago 2014] remove 'propose' and add logos
[berlin 2014] Add sponsor
[berlin 2014] Add some more proposals
Merge pull request #1191 from lenniboy/proposals

[berlin 2014] Logos & Proposals
Added Khushil Dep's proposal
Added David Lutterkort's proposal
Added Eric Sigler's first proposal
Added Eric Sigler's second proposal
Added Heather Mickman's proposal
Added Marta Paciorkowska's ignite proposal
Added Marcelo Ancelmo's first proposal
Added Marcelo Ancelmo's second proposal
Added Marcelo Ancelmo's third proposal
Added Jeff Sussna's proposal