Removes warnings in LocalRepo class.
Remove unused class RDFGraph,
IN/OUT/Knowledge graphs in DPUInstance set as comments.
Remove package commons-app.event.wrapper (2 classes)
Add comments to RDFFormatType
Rename from ETLEvent to DPUEvent.
Delete unused interface Disableable
Remove interface ETLPipeline.
Repair classes Pipeline,PipelineEvent.
Remove Runnable interface from PipelineExecution.
PipelineWorker call run method from PipelineExecution.
Formating classes Engine, PipelineWorker.
Move Engine to backend, synchronize with class PipelineWorker
Remove unused private method createRdfRepository in PipelineExecution.
Move Pipeline events to backend, rename package.
Merge branch 'master' of https://github.com/mff-uk/intlib.git