the sentinel class.
>Trying to implement innerClass tranformation.

Conflicts:
	core/codegen/src/main/resources/JavaTemplates/Declarations/Class.vm
Stable state with the transformation.
add the innerclass to the field innerClasses.
Update .gitignore
Changes made to create correct innerclass declerations.
test flags off
Added tranformations for the extend thread class to where thread is needed.
Merge branch 'gk/codegenconc' of https://github.com/overturetool/overture into gk/codegenconc