Move github-release-plugin into p2update.
Version update.
Merge remote-tracking branch 'origin/master' into release/8.5.0.I201412222129
Fix the URL to snapshots repo.
Merge branch 'release/8.5.0.I201412222129'
Merge tag 'express-8.5.0.I201412222129' into develop

Release.
Back to snapshot versions.