Initial integration of integration tests
Some fixes in code
Renaming NominalData to PureNominalData
Adapting integration tests to pervious changes in API
Removing some old utils
fixed some findbugs warnings
another part of findbugs warnings fixes
Small maven modules renames and reducing properties duplication
Changing maven modules names
Compilation errors fixed
another part of find bugs fixes
comilation error fix
Added missing data files
integration tests fix
Moving ICategoryPriorCalculator into package core.nominal
removing unused imports
CategoryPriorCalculators moved from core.stats to core.nominal
IJobStorage moved from core.storages to core.jobs
some continuous ipeirotis rework