Add startup timeout config parameter. Increase akka ask timeouts for integration tests. Increase akka logger startup timeout.

Made ExecutionGraph, Execution, ExecutionJobVertex, ExecutionVertex, AllocatedSlot, Instance, CoLocationConstraint, SharedSlot and SlotSharingGroupAssignment serializable. Integrated Kryo to be used to serialize Akka messages.

Removed dead instance cleanup from InstanceManager so that Akka's watch mechanism is the current mean to detect dead instances.

Fixed JobManagerITCase to properly wait for task managers to deregister their tasks. Replaced the scheduler's execution service with akka's futures. Introduced TestStreamEnvironment to use ForkableFlinkMiniCluster for test execution.

Reworked local cluster start. TaskManager watches JobManager and tries reregistration in case of disconnect. Introduced akka.ask.timeout config parameter to configure akka timeouts.

Fixed ExecutionVertexCancelTest after removing submitTask and cancelTask.

Moved WebInfoServer and WebInterfaceServer resources into resource folders of respective projects. Jetty uses the jar as base directory.

Removed old events. Adapted webserver communication so that it can now talk to the actor implementations.

Removed old java implementations of the JobManager, TaskManager, JobClient, EventCollector, TaskOperationResult and MemoryArchivist.

Renamed NepheleMiniCluster to FlinkMiniCluster.

Changed RuntimeEnvironment and TaskInputSplitProvider to work with ActorRefs.

Replacing the EventCollector and the MemoryArchivist.

Finished EventCollector and adjusted ExecutionGraph and ExecutionVertex to register actors as listeners.

added further communication logic to jobmanager and taskmanager.

Fixes race condition in ExecutionGraph which allowed a job to go into the finished state without all job vertices having properly processed the finalizeOnMaster method.

This closes #271

The performance of data-intensive jobs using Kryo is probably going to be slow.

Set correct classloader

try to use Kryo.copy() with fallback to serialization copy