Updated Readme to specify that Maven 3 is required.

[ci skip]
Update README.md with required plugins for eclipse 3.7
Change name in base pom and version

End the version name craziness and go back to have 0.4-SNAPSHOT as
version number. Also change the name of the toplevel pom back to
stratosphere.
Changed branch handling logic to correctly recognize disjoint data flow graphs, rather then erroring out.
Fixed erroneous costs handling in sink joiner.
Fixed wrong URL of quickstart script in README file.
[ci skip]
Fix stratosphere-dist to include the scala jars

Also fix an annoying bug that made tests fail because a dependency on
scala-reflect was wrongly in the "test" scope.

Also make alle the examples that work implement PlanAssembler and output
generated example jars for these examples to examples/pact-scala in the
distribution.
Remove ozone from readme [ci skip]
Merge pull request #179 from aljoscha/fix-scala-jars

Fix stratosphere-dist to include the scala jars
Rename hadoopReduce -> groupReduce

Also rename combinableReduce -> combinableGroupReduce
Fixed problems with scripts and default config

- added missing environment variables in scripts
- changed default port of web frontend back to 8080
- replaced bc command with 'expr +' for adding heap sizes
Added toString() methods to configuration and task classed to ease debugging.
prevent chained tasks in the iteration tail for now.
Fixed Stratosphere Website link (relative relative to absolute link)

[ci skip]
Change scala KMeans now that map as last op in interation works
Reworked input channels with respect to returning events and buffers. Simplified logic and fixed bugs and reduced number of status polls.
Reworked record readers to properly support unions and events.
Fixed Nephele Visualization job selection not working on Mac OS X

[ci skip]
Fixed and extended comments in WorksetConnectedComponents example.
[ci skip]
fixed: PactRecord allocating too few memory when writing UTF encoded strings
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