#82 Restructure namespaces

[Bernhard Brem]

Restructure namespaces (see restructure-search.pdf):
- Rename InfoStructure in infostructue
- create a new namespace org.emonic.base.codehierarchy for the CodeHierarchy-classes
- Move all relevant CodeHierarch-classes to this namespace
- Rename FileManipulators in filemanipulators

[Bernhard Brem]

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Namespaces restructured.