HttpBroadcast server cache by default in spark.local.dir instead of java.io.tmpdir

remove unused thread pool

Generate FetchFailedException even for cached missing map outputs

Updated SCALA_VERSION in run2.cmd to match runtime version of Scala

Changed teh scala version to 2.9.2, so that the classes can be found when the classpath is expanded.

Call executeOnCompleteCallbacks in a finally block.

Changed CoGroupRDD's hash map from Scala to Java.

Add missing dependency spray-json to Maven build

Python API (PySpark)

fix spelling mistake in LocalLR example

fix spelling mistake

Executor and JobDescription JSON support added

add repositories section to quick-start SimpleJob pom.xml

Activate hadoop1 profile by default for maven builds

JSON support added to WebUI

Retrieve jars to a flat directory so * can be used for the classpath.

Fix an issue in ConnectionManager where sendMessage may create too many unnecessary connections