Code Generator for Eclipse Code

Remove methode that has same implementation as in super class

Add UML metadata

Implement the code generation in the case of an artefact output file

Updated the build properties to include only the current icons

Refactor, so that different inner classes may be used in a transien way (no lage if then else if ... statements)

clarified todo

Refactor: move the getComputationType method from ICodeGeneratorDelegate into a subinterface that is specificly for Java code generation

Updated test dokument with the stuff that needs to be testet additionaly

UML metadata

Use tje ArtefactCodeGenerator to generate the code artefact