Sahara/ReleaseNotes/0.2

• 实现了插件配置机制 (https://savanna.readthedocs.org/en/latest/devref/plugins.html)
• 实现了 Vanilla Hadoop 插件，支持以下特性 (https://savanna.readthedocs.org/en/latest/userdoc/vanilla_plugin.html)
  • 创建具有不同拓扑的 Hadoop 集群
  • 扩展：调整现有节点组的大小和添加新的节点组 (https://savanna.readthedocs.org/en/latest/userdoc/features.html#cluster-scaling)
  • 支持 Swift 作为 Hadoop 作业的输入和输出 (https://savanna.readthedocs.org/en/latest/userdoc/features.html#swift-integration)
• diskimage-builder 元素，用于自动化 Hadoop 镜像的创建 (https://savanna.readthedocs.org/en/latest/userdoc/diskimagebuilder.html)
• 支持 Cinder 作为块存储提供程序 (https://savanna.readthedocs.org/en/latest/userdoc/features.html#cinder-support)
• 支持 Hadoop 进程的反亲和性 (https://savanna.readthedocs.org/en/latest/userdoc/features.html#anti-affinity)
• OpenStack Dashboard 插件，支持通过 Savanna REST API 暴露的几乎所有操作 (演示视频即将发布)
• Vanilla 插件的集成测试 (https://savanna.readthedocs.org/en/latest/devref/jenkins.html)