Enhancement: install travis rubygem

Related: https://github.com/getcourse/api/pull/868
Merge pull request #371 from till/topics/travis

Enhancement: install travis rubygem
Bugfix: Removed envconf, added nginx-extra
Relocating opsworks_deploy_dir in easybib_deploy

Ensure that everyone runs easybib_deploy now
Bugfix: Typo
Merge branch 'master' into t/config-rendering
Bugfix: easybib_deploy needs a name
Fix: Access_log off for scholar
Fixing the fix: access log from config
Merge pull request #373 from till/t/fix-nginxextra-hhvm

Bugfix: Removed envconf, added nginx-extra
Merge pull request #374 from fh/t/config-rendering

Cleanup: Relocate opsworks_deploy_dir in easybib_deploy
Merge branch 'master' of github.com:till/easybib-cookbooks into topics/hhvm-deploy