Workaround for issue #244 of stratosphere
Fixed multi output operator serialization
Added workaround in post pass for Stratosphere Issue #206
Core functions and aggregations are now specified more fluently; Registries are more independent of Meteor through consequent usage of NameChoosers
Changed ozone version to 0.4-alpha.1; decoupled version of pact-testplan
Fixed most operator base test and ArrayUnion
Fixed array node deserialization
Added Internal annotation for all operators that should not be given to the end users (implementation details etc); Forced public operators to have Name annotation
Fixed parser for safe field access; Made TernaryExpression a PathSegment
Fixed meteor safe method test and named child iterator
Made package loader more robust against loading errors
Made toString in EvaluationContext more robust
Fixed key expression offsets in long records
Added tag to ContextualProjection to indicate that the context is usually much smaller and should be broadcasted
Refactored EvaluationContext and reduced it to a minimum that is necessary to (de-)serialize data
Operators now display their stack during runtime
Added property delegation concept to ConfigurableTypes: operators may now exhibit properties of specific implementations; Sink and Source also use this mechanism for formats
Sink and Source now support parallel property
Fixed CSV format for DOP > 1 and added tests
Added parallel theta join test
Separated data kryo from configuration kryo; configuration kryo supports references again and simplifies seralization of operator tries significantly
minor changes concerning jar-loading in IT's, fixed some compilation bugs, utility method for content checks in IT's