Delete the orphan blocks while initialize WorkerStorage
To swap out those orphan blocks onto underFS/worker/workerID/orphans folder
Use nohup when starting Tachyon daemons
Merge pull request #76 from shivaram/master

Use nohup when starting Tachyon daemons
re-org the comment lines according to the code-style
Write data in bulk instead of byte-by-byte
Merge pull request #73 from GraceH/rm-orphanBlocks

Delete the orphan blocks while initialize WorkerStorage
HDFS implementation becomes configurable from tachyon-env.sh
HDFS implementation becomes configurable from tachyon-env.sh
Merge pull request #77 from aslanbekirov/master

HDFS implementation is now configurable from tachyon-env.sh
Merge pull request #67 from calvinjia/failover

Failover
Fix journal test to init master info