Update devise and devise_mailchimp
Fixes Travis tests
Replaces static dates by variable dates ("next week"), thus preventing time-issues
Fixes Travis
You are no longer asked to validate GitHub's key when testing with Travis
Merge pull request #330 from boersmamarcel/hotfix-cucumber-dates

Fixes Travis tests
Merge branch 'master' of github.com:boersmamarcel/challengesplatform into hotfix-devise-update-CSRF
Merge pull request #329 from boersmamarcel/hotfix-devise-update-CSRF

Update devise and devise_mailchimp
Merge branch 'master' into search-tooltips