Code Generator for Eclipse Code

Refactored the class BasicGeneralCodeGenerator as to remove all UI dependencies

Introduce new class for MinimalArtifactDelegate for abstration of UI concerns

Added UML tags
Intoduced sub interface ICodeGeneratorDelegate to encapsule UI functionality

Seperation of UI concerns in the Serializer hierarchy

Fixed the problem in the extract combination when either the combinates Template AST or neither AST or JET was selected

Only filter the generation drop down list when appropriate (drop down is enabled and legal combination). This fixes #25

Removed the now unused MultipleArtifactRegistry

Remove the use of MultipleArtefactregistry

moved method getShellDisplay int subclasses

Improve the logging stack to provide more compatibility