Merge pull request #291 from IngmarKrusch/master

Berlin: fixed sponsor logos for idealo and axelspringer
added Jeff Sussna - Beyond devops
8 mistakes that prevent DevOps success
fixed some authors for proposals
added hyatt discount code & avatar alternative
added oreilly as media sponsors
added oreilly discount code
fine tuning layout of oreilly discount code
added stackdriver sponsoring for MV 2013
Ignite: Adrian Cockcroft: Beer, Pineapples and Bottlenecks
J. Paul Reed: Is Your Team Instrument Rated (or: Deploying 89,000 times a day)
Nate Johnson: Panel: Strategies for 'Pushing' DevOps
Added bio for Joan Touzet
Merge pull request #292 from rberger/BeerPinapplesAndBottlenecks

Ignite: Adrian Cockcroft: Beer, Pineapples and Bottlenecks
Merge pull request #293 from rberger/IsYourTeamInstrumentRated

J. Paul Reed: Is Your Team Instrument Rated (or: Deploying 89,000 times ...
Merge pull request #295 from rberger/ComingToTermsWithChef_1

Added bio for Joan Touzet
Merge pull request #294 from rberger/StrategiesForPushingDevops

Nate Johnson: Strategies for 'Pushing' DevOps
added New Relic to Silver Sponsor MV 2013
add new propsal from Sam Newman
Merge pull request #296 from gergnz/master

add new propsal from Sam Newman