Code Generator for Eclipse Code

Added descriptive attribute to the extension point. This is part of #43.

Do not export org.eclipse.emf.codegen in ch.sahits.codegen

Do not reexport the plugins org.eclipse.ui and org.eclipse.help in ch.sahits.codegen.help

Let the interface IASTGeneratorInitializer implement the IASTGenerator Interface

Completed the separation of UI and general stuff for ch.sahits.codegen

Applied changes to reflect on the moving of classes

Refactored after the moving of the file

Removed commented code

Removed fixme that was released with 2.0.0

Refactored the class BasicGeneralCodeGenerator as to remove all UI dependencies