automatically updated dependencies
Updated survey to track migrated previous surveys
Added migration to re-update the certificates that have expired
Merge pull request #722 from theodi/update-dependencies-2013-12-11

automatically updated dependencies
Merge pull request #723 from theodi/bugfix-certificate-expiry

Bugfix certificate expiry
Merge branch 'refs/heads/master' into feature-certificate-auditing

Conflicts:
	db/schema.rb