Support for passing end-of-output message to executeQuery().
Also some formatting in the toolkit and server suite.
Add StorageLevel String matching method in CacheManager
Support "Insert" updates for cached tables.
Only allows updating a single cached table at a time.
(ex. can't use Hive's multi-insert extension)
Tests for INSERT updates on cached tables
Merge remote-tracking branch 'src/master' into tmp
Remove CacheKey class
Added HiveStructSerializer to serialize data rows.
Created memstore2 for Tachyon. Columns are now stored as ByteBuffer's.
Only integer columns are supported at the moment.
Configuring JobConf using the storage handler
Merge pull request #89 from mbautin/storage_handler_job_properties

Configuring JobConf using the storage handler
Rename Split to Partition, per Spark commit

https://github.com/mesos/spark/commit/06e5e6627f3856b5c6e3e60cbb167044de9ef6d4#core/src/main/scala/spark/Partition.scala
Removed EnhancedRDD and use Spark's PartitionPruningRDD instead.
Merge branch 'master' into tachyon
Add Tachyon jar.
save into tachyon works.
clean the code
Basic I/O works for Int.
add more primitive types support.
duplicate the buffer to avoid concurrent access issue.
fix several hard coded numbers