Fix Bug of Join Filter
Should be included only once for rows from either side that doens't pass the join filter condition
code refactoring the join filter
fix bug in right outer join filter
fix small bugs in unit test
update the unit test cases set
Merge branch 'join_filter_bug' of github.com:chenghao-intel/shark into join-cheng
Ignore the Hive CLI Test Suite so we don't run them in scalatest.
Merge branch 'master' into join-cheng
Style cleanups.
review comment.
Merge pull request #290 from rxin/join-cheng

join code update
Made ReduceKeyReduceSide serializable for external spill.
Merge pull request #292 from rxin/spill

Made ReduceKeyReduceSide serializable for external spill.