Integrated Pipeline: metaInfo-dependencies of objects are now explicit, removed some explicit micro-classes

Integrated Pipeline: transformed ParsingTaskGenerator into a trait, changed TreeParser trait implementing classes

-removed the two mini-classes implementing Directory/Zip sources and replaced them with an anonymous class in Main

Integrated Pipeline: got rid of TreeParserFlow, replaced by TreeParser which integrates with Streams via MessageProcessor(Flow)

Integrated Pipeline: added TreeParser trait, will replace TreeParserflow with a MessageProcessor based implemention

Integrated Pipeline: added Variance annotations to MessageProcessor and changed expected exception class

Integrated Pipeline: got rid of some unused implicit config parameters, made implicit parser collections explicit

Integrated Pipeline: removed trait ParsingTaskGenerator (implementors become Iterators, counting functionality moved to TreeParserFlow)

Integrated Pipeline: moved task-generation features from ParsingTaskGenerator trait to companion object

-removed stream timeout setting from package object
-replaced name operations on parsers with fixed strings because parsers implicitly load
 all metainfo
-made meta-info in package object a lazy implicit

-archives are now unpacked when the first parsing task arrives

Integrated Pipeline: added end-to-end tests for parsing rawdata-archive content with multiple workers

Integrated Pipeline: added a short sleep to mock processing in CalculationParsingFlowSpec to stabilize task distribution

Integrated Pipeline: added tests to verify interleaved processing of multiple file tress in ParsingResultsProcessingManager

-MessageProcessor has a new function "requiresMoreMessages" which is used to determine if
 the graph stage can finish cleanly once no more inbound messages arrive

Integrated Pipeline: basic implementation of MessageProcessorFlow (will replace existing graph elements)

-MessageProcessorFlow is an abstract graph element powered by an underlying MessageProcessor,
 it handles one-to-one, one-to-many and many-to-one processing stages all alike

Integrated Pipeline: added behaviour tests for MessageProcessor trait, ParsingResultsProcessingManager implements it

Integrated Pipeline: started introducing ParsingResultsProcessingManager to separate application logic from streams integration

Integrated Pipeline: moved path/treetype validation logic from Graph element to CalculationParsingEngine

Integrated Pipeline: ParsingResults now have an explicit field for the error message of failed parsing tasks

Integrated Pipeline: further rework of the CalculationParsingEngine tests to make them more flexible