0.10-SNAPSHOT continues on branch release-0.10

This closes #1241

Update Scala 2.11 version and jline dependency.

This closes #1197

[FLINK-2786] Remove Spargel code and docs; Port Spargel tests to Gelly; Remove Beta badge from Gelly

This closes #1229

This closes #1004

This closes #987

Closes #851

This can either be used to connect to a Flink cluster or in local mode
with a cluster in the same JVM.

This only works for Scala 2.10 for now because the Scala REPL was
modified in 2.11.

This closes #189

Package name is now flink-table. ExpressionOperation is renamed to
Table.

This also adds more JavaDoc and ScalDoc.

[FLINK-1695] [ml] Initial commit to establish module structure. Adds simple Vector and Matrix types.

- 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

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

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.

This commit is based on a diff by @fpompermaier (see https://github.com/apache/incubator-flink/pull/220).

This closes #220

This closes #232

- 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.