Make Git ignore ASC files generated during publishing
0.11.0-shark-SNAPSHOT => 0.11.0-shark
Merge pull request #45 from harveyfeng/shark-0.11

Some changes to build files for pushing to Sonatype/Maven Central
Fixed concurrency problem in HiveHistory.java (contributed originally by @kayousterhout)
Fix bug of boolean equals() method, the reference comparison works incorrectly after deserialization.

Originally contributed by @chenghao-intel
Fix NullPointerException for Constant Null value

Originally contributed by @chenghao-intel
Reduce lock contention in ExprNodeGenericFuncEvaluator and ShimLoader.

Originally contributed by @chenghao-intel.
Merge pull request #46 from rxin/fixes

Apply some important fixes again for Hive 0.11
Changed Hive version to 0.11.0-shark-0.9.1.
Don't build hcatalog
Merge pull request #47 from harveyfeng/build

Don't build hcatalog
Revert "remove HiveConf and Configuration from thread-local after conection to hiveserver is closed"

This reverts commit 28e1d8a75371d125813077649af3448420c49cfd.
Merge remote-tracking branch 'origin/shark-0.11' into secure

Conflicts:
	.gitignore