include examples source code into assembly

The source code for the examples is now placed inside
`/examples/scala-src` and `/examples/java-src`.


```
robert@robert-tower ...bin/stratosphere-0.5-SNAPSHOT/examples (git)-[exsrc] % find .
.
./stratosphere-java-examples-0.5-SNAPSHOT-EnumTrianglesWithDegrees.jar
./stratosphere-java-examples-0.5-SNAPSHOT-WebLogAnalysis.jar
./stratosphere-java-examples-0.5-SNAPSHOT-EnumTrianglesOnEdgesWithDegrees.jar
./stratosphere-scala-examples-0.5-SNAPSHOT-ConnectedComponents.jar
./stratosphere-scala-examples-0.5-SNAPSHOT-TPCHQuery3.jar
./stratosphere-scala-examples-0.5-SNAPSHOT-WordCount.jar
./stratosphere-scala-examples-0.5-SNAPSHOT-javadoc.jar
./scala-src
./scala-src/datamining
./scala-src/datamining/BatchGradientDescent.scala
./scala-src/datamining/LanczosSO.scala
./scala-src/datamining/KMeansForTest.scala
./scala-src/datamining/KMeans.scala
./scala-src/graph
./scala-src/graph/PageRank.scala
./scala-src/graph/EnumTrianglesOnEdgesWithDegrees.scala
./scala-src/graph/LineRank.scala
./scala-src/graph/ComputeEdgeDegrees.scala
./scala-src/graph/ConnectedComponents.scala
./scala-src/graph/TransitiveClosureRD.scala
./scala-src/graph/TransitiveClosureNaive.scala
./scala-src/graph/PageRankWithWeight.scala
./scala-src/wordcount
./scala-src/wordcount/WordCount.scala
./scala-src/wordcount/WordCountWithUserDefinedType.scala
./scala-src/wordcount/WordCountWithCount.scala
./scala-src/grabbag
./scala-src/grabbag/Grabbag.scala
./scala-src/relational
./scala-src/relational/WebLogAnalysis.scala
./scala-src/relational/RelationalQuery.scala
./java-src
./java-src/incremental
./java-src/incremental/pagerank
./java-src/incremental/pagerank/DeltaPageRankWithInitialDeltas.java
./java-src/triangles
./java-src/triangles/EnumTrianglesRdfFoaf.java
./java-src/triangles/EnumTrianglesWithDegrees.java
./java-src/triangles/io
./java-src/triangles/io/EdgeWithDegreesInputFormat.java
./java-src/triangles/io/TriangleOutputFormat.java
./java-src/triangles/io/EdgeWithDegreesOutputFormat.java
./java-src/triangles/io/EdgeInputFormat.java
./java-src/triangles/ComputeEdgeDegrees.java
./java-src/triangles/EnumTrianglesOnEdgesWithDegrees.java
./java-src/shortestpaths
./java-src/shortestpaths/PairwiseSP.java
./java-src/sort
./java-src/sort/terasort
./java-src/sort/terasort/TeraKey.java
./java-src/sort/terasort/TeraValue.java
./java-src/sort/terasort/TeraOutputFormat.java
./java-src/sort/terasort/TeraInputFormat.java
./java-src/sort/terasort/TeraDistribution.java
./java-src/sort/ReduceGroupSort.java
./java-src/sort/TeraSort.java
./java-src/kmeans
./java-src/kmeans/udfs
./java-src/kmeans/udfs/PointOutFormat.java
./java-src/kmeans/udfs/RecomputeClusterCenter.java
./java-src/kmeans/udfs/ComputeDistance.java
./java-src/kmeans/udfs/PointInFormat.java
./java-src/kmeans/udfs/CoordVector.java
./java-src/kmeans/udfs/FindNearestCenter.java
./java-src/kmeans/udfs/ComputeDistanceParameterized.java
./java-src/kmeans/KMeans.java
./java-src/kmeans/KMeansIterative.java
./java-src/kmeans/KMeansSampleDataGenerator.java
./java-src/util
./java-src/util/ConfigUtils.java
./java-src/connectedcomponents
./java-src/connectedcomponents/WorksetConnectedComponents.java
./java-src/wordcount
./java-src/wordcount/WordCountOptimized.java
./java-src/wordcount/AnonymousWordCount.java
./java-src/wordcount/WordCountAccumulators.java
./java-src/wordcount/WordCount.java
./java-src/relational
./java-src/relational/generator
./java-src/relational/generator/WebLogGenerator.java
./java-src/relational/WebLogAnalysis.java
./java-src/relational/TPCHQuery3.java
./java-src/pagerank
./java-src/pagerank/DiffL1NormConvergenceCriterion.java
./java-src/pagerank/PageRankStats.java
./java-src/pagerank/DotProductMatch.java
./java-src/pagerank/DanglingPageRankInputFormat.java
./java-src/pagerank/DanglingPageRank.java
./java-src/pagerank/DotProductCoGroup.java
./java-src/pagerank/PageWithRankOutFormat.java
./java-src/pagerank/PageRankStatsAggregator.java
./java-src/pagerank/ImprovedAdjacencyListInputFormat.java
./java-src/pagerank/SimplePageRank.java
./java-src/pagerank/LongArrayView.java
./java-src/pagerank/AsciiLongArrayView.java
./stratosphere-scala-examples-0.5-SNAPSHOT-KMeansForTest.jar
./stratosphere-java-examples-0.5-SNAPSHOT-TPCHQuery3.jar
./stratosphere-scala-examples-0.5-SNAPSHOT-KMeans.jar
./stratosphere-java-examples-0.5-SNAPSHOT-DanglingPageRank.jar
./stratosphere-java-examples-0.5-SNAPSHOT-ConnectedComponents.jar
./stratosphere-java-examples-0.5-SNAPSHOT-KMeansIterative.jar
./stratosphere-java-examples-0.5-SNAPSHOT-TeraSort.jar
./stratosphere-scala-examples-0.5-SNAPSHOT-ComputeEdgeDegrees.jar
./stratosphere-java-examples-0.5-SNAPSHOT-PairwiseSP.jar
./stratosphere-java-examples-0.5-SNAPSHOT-EnumTrianglesRdfFoaf.jar
./stratosphere-java-examples-0.5-SNAPSHOT-javadoc.jar
./stratosphere-scala-examples-0.5-SNAPSHOT-EnumTrianglesOnEdgesWithDegrees.jar
./stratosphere-java-examples-0.5-SNAPSHOT-WordCount.jar
./stratosphere-java-examples-0.5-SNAPSHOT-KMeans.jar
```