WebLog Analysis example
Transitive closure Scala example
Added TriangleEnumeration examples for reworked Scala API.
Add logback-test.xml to java8-tests and logback.xml to java-examples
Adds PageRankBasic Scala example. Removes old Scala examples
Pi estimation example job in Scala
[scala] Add Field Name Key Support for Scala Case Classes

This does not change the runtime behavious. The key field names are
mapped to tuple indices at pre-flight time.

Also extends tests to cover the new feature.
Add SemanticPropertiesTranslationTest for Scala API

Fix join operator to user proper EquiJoin constructor so that semantic
properties are actually retrieved.

Fix typo, getSematicProperties -> getSemanticProperties
Add Scala API completeness Test

This is very naive right now, just checks whether a function of the same
name is available. There are lists and regex patterns of excluded
functions since not all functions in the Java API need to be available
in the Scala API.
Added LinearRegression scala example. Removed old BGD example.
Renamed java examples package
Fix rename of java example package to examples

Some occurences in comments and POMs where not updated.

Also change signature of join and coGroup to always return a value, not
an Option.
[scala] Fix Formatting in Examples and add ITCases

Also actually use termination criterion in TransitivelClosureNaive
Java example.

Add ConnectedComponentsITCase for Scala Example

Also fix some formatting in the example code

Add WebLogAnalysisITCase for Scala Example

Some minor reformatting of example code and scaladoc.

Add ITCases for TriangleEnumeration Scala Examples

Also fix some formatting and make TriangleEnumerationOpt Scala produce the
same output as the Java version.

Add PageRankITCase for Scala Example

Also fix formatting in PageRank Scala Example.

Fix formatting in EnumTriangles Scala Examples

Remove Old/Deprecated Scala Examples and ITCases

Fix formatting in EnumTrianglesBasic.scala

Fix formatting in LinearRegression Scala Example

Remove old Scala LineRank Code and RelQuery Example

[scala] Fix typo in scaladoc in GroupedDataSet

[scala] Fix Scaladoc of Join and CoGroup Operation

Was still referring to the type of join/coGroup function that returns an
Option.

Fix tab vs. spaces in flink-scala and flink-scala-examples
[scala] Reactivate DeltaIterationSanityCheckTest
[scala] Add Scalastyle, use scalastyle-config.xml from Spark
Rename ScalaTupleTypeInfo to CaseClassTypeInfo

This better reflects what it is actually for. It is still derived
from TupleTypeInfoBase, though.
[doc] Switch parser to kramdown, normalize Headings

The switch to kramdown is necessary because I want to add tabs in the
documentation for code examples and Redcarpet does not allow markup
inside divs.

Before, some doc pages had "#" headings as toplevel headings while
others had "##" (which is the same as --- underlined headings). Now we
user level 2 everywhere. The page title is still a h1 heading.
Add ExecutionEnvironment to ScalaAPICompletessTest
Rewrite Java API Guide as Unified Programming Guide

This now covers both Java and Scala.
[doc] Unify Examples Page

Now contains Java and Scala examples with tabs to switch between the
two.