Change Spark version to 0.7.0-SNAPSHOT
Updates based on Spark shuffle refractoring.
Move Shark's CoGroupedRDD from spark.rdd to spark package, to avoid conflict.
Merge remote-tracking branch 'src/master' into master-updates
Set default cache storage level to MEMORY_AND_DISK
Merge pull request #75 from harveyfeng/master-updates

Updates based on Spark shuffle refractoring for 0.7 upgrade.
Merge pull request #84 from mbautin/taskcontext-fix

Adding TaskContext to compute methods in Shark RDDs (patch by Thomas Dudziak)
Updated Kryo registrator for Kryo 2.x.
SHARK-111: Automatically sends s3 credentials from master to slaves.
SHARK-112: ClassNotFoundException on shark-shell.
Maven POM file for Shark, Debian packaging, and "run" script improvement

- Adding a POM file for building with Maven, both with Hadoop 1 and Hadoop 2
- Adding Debian packaging
- Updating the run script to be able to run with a fat jar (no Scala
  dependency).
Adding a hive-site.xml that specifies where to find test data files
Specifying plugin revisions and hive version
Fixing scala version, .deb file name, and jdeb settings (contributed by Thomas Dudziak)
Use the newer scala-maven-plugin
Updating Debian packaging control file
Setting Java version to 1.5 in pom.xml
Updating version to 0.3.0-SNAPSHOT
Use provided scope for dependencies (Hadoop and Hive)
Removing commented-out filter element