Merge pull request #273 from dosoft/exim-tests

Fixed testCliDriver_exim_* tests (check local Path before using)
Merge pull request #289 from harveyfeng/master

Use SNAPSHOT Hive 0.11 jars from Maven Central
Merge pull request #291 from harveyfeng/master

JVM 1.6, SNAPSHOT 0.9.1
Merge pull request #290 from rxin/join-cheng

join code update
Merge pull request #292 from rxin/spill

Made ReduceKeyReduceSide serializable for external spill.
Merge pull request #294 from rxin/beeline

Added beeline script.
Merge pull request #293 from rxin/cache1

Made _cached MEMORY_ONLY by default.
Merge pull request #298 from sundeepn/nested

Fix to handle nested hive partitions in cached mode.
Merge pull request #297 from tianyi/master

Null mergeCombiners will cause NPE in ExternalAppendOnlyMap
Merge pull request #301 from guowei2/master

FIX: LazyPTFIterator lose the last row when its partitionKey is different from the previous row's
Merge pull request #302 from marmbrus/fixJobGroup

Only set the job description instead of also overriding the job group.
Merge pull request #304 from sundeepn/fifopolicy

Merge pull request #43 from sundeepn/fifocache
Merge pull request #305 from sundeepn/coalesce

Allow users to control the number of tasks for table scan operations
Merge pull request #296 from harveyfeng/master

Fix bug in SparkLoadTask for `CACHE <partitioned_table>`
Merge pull request #313 from haoyuan/master

bump tachyon dependency to 0.4.1
Merge pull request #300 from harveyfeng/rewrite-09

AST transformations for DISTINCT aggregates