Merge pull request #202 from jbraeuer/master

Berlin 2013: +2 proposals.
collanet is platinum sponsor -> moved to Amsterdam
added collabnet logo for amsterdam
Paris 2013 - this ignite will be in French
Paris 2013 - let people know we're still looking for ignite talks
Merge pull request #203 from masterzen/paris-ignite

Paris 2013 - some ignite change
Paris 2013 - fix those ignite links I just added

And I should learn to check every link before pushing my commits.
Sorry.
I won't do it again.
Merge pull request #204 from masterzen/paris-ignite-fix

Paris 2013 - fix those ignite links I just added
Adding dell as happy hour sponsor
updating dell link for austin
Berlin 2013: Gabor Veszi's proposal.
Berlin 2013: Christian Theune's proposal.