v1.0.0 Release

Merge pull request #393 from lylei/ha.fix

fix slave safemode

v0.2 Release

• Push replica from source to destination in recover process instead of pulling from the source
• Naive multi-data center placement strategy
• 副本恢复由拉改推，加快恢复速度
• 简单的跨机房副本放置策略

v0.1 Release

• Support create, read, write and delete
• Use leveldb to manage namespace, support high performance list and rename
• Replica placement strategy and recover strategy
• Implement FUSE, support random write on small files
• 实现了文件创建、读写和删除接口
• 通过leveldb管理目录树，支持高效的list、rename
• 文件多副本冗余存储、宕机自动副本修复
• 通过fuse实现mount，并简单支持随机写