Code Generator for Eclipse Code

Set up the validation of for the headless build

Added Validator for generation definition in the headless build

Added enumeration for input method and generation method for console based calls

Added enumeration for the headless Java code generation

Externalize the Generator names. This is part of #46

Merged from branch UI_seperation_II

Use english description text instead of german

Fixed the problems in the generation of jetemplates and java artefacts arrisen with the implementation of #43

Process the improved extension point for generators

Process the improved extension point for generators