This closes #454

This closes #450

This closes #333

- 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

 - Remove obsolete code from old IPC net utils
 - Smaller Writable/IOReadableWritable serialzation buffer start size (most messages are rather small)
 - For message logging, make system calls (timestamps) only in debug mode
 - Clean up warnings / code simplifications

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

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

Replacing the EventCollector and the MemoryArchivist.

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

Add optional test for external sorting of case classes.
Fix various warnings.

This closes #232

- Clean dependencies in flink-streaming connectors

  - add "flink-shading" for shaded libraries (currently guava only)
  - relocate guava in all projects and exclude it from the lib and exported dependencies
  - Exlude unnecessary transitive dependencies from hadoop 1

Users using CDH4 can now build Flink against Hadoop 2.0.0-alpha.

- update _config.yaml of integrated documentation
- quick check on the quickstarts / build instructions to match the latest release
- quickstart.sh scrips now point to the correct versions.

This closes #72

source should now build without the presence of a .git directory
included the quickstart-archetypes into the main project.

disable the MatchJoinCancelingITCase test to speed up travis builds