Removed context argument from creation interfaces.
Working on the high-level config architecture.
Renamed 
  PipelineNode     -> PipelinePartNode
  PipelineNodeList -> PipelineNode
Changed ConfigNode to store PropertyNodes in a list instead of a map, as
it is processed later anyway.
Added test for ConfigEvaluator
Integrated new config with XmlBootstrap. Extremely "quick'n'dirty" way,
needs lots of work.
Working on config, cleaning up after the integration