Address the eronous namespace use for the log configuration. [REEF-18]
Contributed by John Yang <johnyangk@gmail.com>
Closes #6
Refactoring of the ShellTask in reef-examples [REEF-19]
Contributed by Yunseong Lee <yunseong.lee@me.com>
Closes #7
Merge pull request #1 from apache/master

fetch upstream