Add check for empty String for the local directory in addition to null.
Add logging to detect why return null.
wrong param name in comment
turned off krb so mac users using java 7 can run tests
Merge pull request #476 from dcapwell/testdfsio-mac

turned off krb so mac users using java 7 can run tests
Merge pull request #475 from CrazyJvm/StorageDir-comment

StorageDir : wrong param name in comment
Merge pull request #439 from hsaputra/add_logging_localtempfolder

Add check for empty String for the local directory in addition to null and add logging.
tweak TachyonFS logging.
Add checkstyle support for Google code style.

Add checktyle 2.8 to the maven checkstyle plugin to be able to corretly parse Google Java style rules.

First drop to fix code based on Google style.

Fix unit tests fail.
Fix rules on imports.
Remove commneted out rules.
Add checkstyle for Google Java style of constants name.
Add rule for StaticVariableName to check for static, non-final fields.
Merge pull request #473 from hsaputra/checkstyle_goog

TACHYON-182 Add checkstyle to the maven build system so we could reduce time to do style check for contributions
tweak
simplify getOpType by using Enum's static function valueOf
Attempt to lower the number of resources consumed while running tests
recompute uses thread pool now
update documents to have a underfs page
made kill command be more polite
refactor according to comments