This closes #160

This closes #159

This closes #158

Pass hostname to split assigner
Avoid clashes by only using the first component of the fully qualified hostname

Fix the Javadoc link for org.apache.flink.api.common.functions.RichFunction and missing method reference in DataStream class.

Author: Henry Saputra <henry.saputra@gmail.com>

Closes #154 from hsaputra/fix_comments_streaming and squashes the following commits:

127e47a [Henry Saputra] Fix the Javadoc link for org.apache.flink.api.common.functions.RichFunction and missing method reference.

[streaming] Added CoBatchedDataStream and CoWindowDataStream with reduce functionality + CoBatchReduce bugfix

[streaming] RAT & Checkstyle fix

[streaming] Grouped window reduce bugfix

Iterator is a subclass of TraversableOnce, so it doesn't break existing
code. We can have an Iterator anyways and it provides more functions for
the user.

Fix bug in Blob Manager, Cleanup Timer was not cancelled on Shutdown                                          -

The java8 Xdoclint:none fix was not correctly transferred when moving
the javadoc building to a jekyll plugin.

Also fixes a bug with Java/Scala interop: TupleTypeComparator was only checking
for nested Java Tuples and Pojos, not Scala Case classes.

This closes #146

Added Flink logo to JobManager web interface.
Updated Run Example Quickstart screenshots
Removed old gradients and unused image files from submission client.

This closes #145.

This closes #131