Updated assets for buildpacks

- Added ruby version to Gemfiles
- Added auto-config for ruby and node as server no longer does autoconfig for Node and Ruby
- Added gem files since we don't allow ruby without them
- Added package.json since we don't allow node without them
- Added (sometimes) $stdout.sync = true when ruby apps were missing logs

- Deleted all autoconfig disabled test assets (disabled_by_file, disabled_by_gem, disabled_by_module)
as server no longer does autoconfig for Node and Ruby
- Deleted vendored gems
- Deleted node_dependencies test assets since npm version > 1.2.1 seemed to conflict with
node 0.4 and otherwise npm-shrinkwrap is ignored

- Locked down node versions
Add Play 2.1 test assets
Merge branch 'play-2.1'