Merge branch 'master' into implicit-als

assembly/pom.xml

bagel/pom.xml

core/pom.xml

core/src/main/scala/org/apache/spark/CacheManager.scala

core/src/main/scala/org/apache/spark/SparkContext.scala

...scala/org/apache/spark/api/python/PythonPartitioner.scala

...rc/main/scala/org/apache/spark/api/python/PythonRDD.scala

...src/main/scala/org/apache/spark/deploy/JsonProtocol.scala

.../main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala

core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala

core/src/main/scala/org/apache/spark/util/Utils.scala

...scala/org/apache/spark/scheduler/SparkListenerSuite.scala

core/src/test/scala/org/apache/spark/util/UtilsSuite.scala

docs/_layouts/global.html

ec2/spark_ec2.py

examples/pom.xml

mllib/pom.xml

pom.xml

python/pyspark/rdd.py

python/pyspark/serializers.py