Release 0.2 (2018-5-18)

MR3

• Support asynchronous logging (with mr3.async.logging in mr3-site.xml).
• Delete DAG-local directories after each DAG is finished.

Hive on MR3

• Support LLAP I/O for Hive 2.
• Support Hive 2.2.0.
• Use Hive 2.3.3 instead of Hive 2.3.2.