Fix for hanging spark.HttpFileServer on the kind of virtual network

Handle slaveLost before slaveIdToHost knows about it.

Use default arguments instead of constructor overloads.

Remove unneeded/now-broken saveAsNewAPIHadoopFile overload.

Move JavaAPISuite into spark.streaming.

Add SparkContext.hadoopConfiguration

Conflicts:
	core/src/main/scala/spark/SparkContext.scala
	core/src/main/scala/spark/api/java/JavaSparkContext.scala

As part of this, changed our Scala 2.9.2 Kafka library to be available
as a local Maven repository, following the example in
(http://blog.dub.podval.org/2010/01/maven-in-project-repository.html)

Add checkpointing to the Python API

Fix PythonPartitioner equality

PythonPartitioner did not take the Python-side partitioning function
into account when checking for equality, which might cause problems
in the future.

Merge Streaming into master

Conflicts:
	core/src/main/scala/spark/api/python/PythonRDD.scala

Add accumulators to PySpark

Python ALS example