PUBLIC MARKS with tags sfSyncClusterPlugin & sync

The sfSyncClusterPlugin introduces a symfony sync-cluster task. The symfony sync-cluster task is intended as a replacement for the symfony sync task. While the plugin is backwards-compatible with symfony sync (they even use the same configuration files) this plugin offers several advantages over a traditional symfony sync. The symfony sync-cluster task: * Synchronizes a Symfony application across an unlimited number of servers. Symfony's sync only works for a single server. * Clears the Symfony cache on each server with a symfony cc. Doing this with sync requires an additional command. * Allows you to use ssh public/private keyfile authentication so you won't be prompted for a password during long deployments. * Allows you to deploy your web assets to a CDN without having to copy your entire site. The sfSyncCluster currently supports standard rsync transfer and transfer to Amazon S3. * Allows you to specify groups of servers to sync. If you have many servers, you can place them into logical groups and move them around quickly.