Also dumped the stable release version in the docs config

This closes #333

This closes #355

This closes #345

- users can now also deploy Flink on YARN for executing a single job.
- The flink-yarn project has been moved out of the flink-addons module
- the MiniYARNCluster is used for testing Flink on YARN
- There is now a (undocumented) Java interface Flink's YARN client, allowing users to manually control the Yarn session.
- ALL ports used by Flink when running on YARN are automatically determined. In the past users reported problems with blocked ports (YARN is telling the client the RPC address of the application master)
- The checks before deployment have been improved to give better error messages if the user is requesting too many resources for a YARN session

Updated NOTICE files
Updated inceptionYear in pom

  - Move sling JSON dependency to streaming connectors (prev streaming core)
  - Exclude YARN API from transitive mapreduce-core dependencies we use the dependency
    only for .mapred and .mapreduce interfaces
  - Remove some unnecessary dependencies (junit in java8)
  - Manage Kryo dependency
  - Cleanup minor POM warnings.

This closes #268

to HadoopFileSystem wrapper, which supports all subclasses of org.apache.hadoop.fs.FileSystem.
This allows us to let users use all file systems with support for HDFS.
The change has been tested with Tachyon, Google Cloud Storage Hadoop Adapter and HDFS.

The change also cleans up the Hadoop dependency exclusions.

Removed Disclaimer file
Eliminated unnecessary incubating substrings
Bumped version to 0.9-SNAPSHOT

Use Akka version 2.2.1 for hadoop version 2.0.0-alpha to resolve dependency conflicts. Adjust code to comply to respective Akka API. Remove obsolete TODO.

Add option to use single actor system for local execution. Use local connection manager if a single task manager is used for local execution. Remove synchronized blcok in getReceiverList of ChannelManager which effectively serialized the connection lookup calls of a single task manager.

Fix Java6 problem that File has no method toPath

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

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

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

Renamed NepheleMiniCluster to FlinkMiniCluster.

Replacing the EventCollector and the MemoryArchivist.

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

Made exceptions for license check plugin more fine-granular.

This closes #250

This closes #232

This closes #217