Trying to fix HBase support issue in TACHYON-27
Optimize imports; reformat code style; improve javadoc; remove the commented code.
Linked to TACHYON-46 in Javadoc
Improve Javadoc comments
Merge branch 'master' of https://github.com/amplab/tachyon into createNonRecursive
createNonRecursive() should throw exception if parent directory doesn't already exist,  which is extremely important for HBase to do fencing of dead region servers properly.
new example
Merge pull request #355 from dcapwell/example-nobuffer

new example
Merge pull request #322 from pfxuan/createNonRecursive

Trying to fix HBase support issue in TACHYON-27
print version number in master/worker/client log
log twaek