Merge branch 'mesos'

.gitignore

bagel/pom.xml

bagel/src/test/resources/log4j.properties

core/pom.xml

core/src/main/scala/spark/Accumulators.scala

core/src/main/scala/spark/BoundedMemoryCache.scala

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

core/src/main/scala/spark/CacheTracker.scala

core/src/main/scala/spark/DaemonThreadFactory.scala

core/src/main/scala/spark/HttpFileServer.scala

core/src/main/scala/spark/HttpServer.scala

core/src/main/scala/spark/KryoSerializer.scala

core/src/main/scala/spark/Logging.scala

core/src/main/scala/spark/MapOutputTracker.scala

core/src/main/scala/spark/PairRDDFunctions.scala

core/src/main/scala/spark/ParallelCollection.scala

core/src/main/scala/spark/Partitioner.scala

core/src/main/scala/spark/RDD.scala

core/src/main/scala/spark/RDDCheckpointData.scala

core/src/main/scala/spark/SequenceFileRDDFunctions.scala