Merge pull request #51 from reebalazs/gh-pages

schedule changes, add pre-rupy sprint
fix: update elasticsearch logo
Merge pull request #52 from AdrienGiboire/master

fix: update elasticsearch logo
Merge pull request #53 from reebalazs/gh-pages

Move Brandon to Saturday
add olivier hervieu as a speaker
Merge branch 'gh-pages' of github.com:rupyconf/13.rupy.eu
Merge pull request #54 from AdrienGiboire/master

Master
set title of eleanor's intervention
Merge pull request #55 from AdrienGiboire/master

set title of eleanor's intervention