Add Dummy StorageHandler which useful in SELECT benchmarking test
Fix NullPointerException for Constant Null value
Merge pull request #21 from chenghao-intel/chenghao/shark-0.9

Add Dummy StorageHandler & Fix NullPointerException bug of ExprNodeConstantDesc
Merge branch 'shark-0.9' of https://github.com/amplab/hive into shark-0.9-csd
Pushed zookeeper back to 3.4.3
Bumped version number