[Sirius] Integrate the code from org.eclipse.papyrus-sirius git into the git org.eclipse.papyrus-desktop

The git org.eclipse.papyrus-sirius contains the code for:

• Sirius integration into Papyrus
• EEF Integration into Papyrus
• UML Sirius Diagrams
• UML EEF Property Views
• Papyrus-Sirius Documentation
• Papyrus-Sirius EEF Documentation
• JUnit tests

I propose this migration plan from the git Papyrus-Sirius to the git Papyrus-Desktop:

• features:

  • tests -> into papyrus-sirius-tests-features

  • toolsmiths -> into papyrus-toolsmiths-features

  • others -> into papyrus-sirius-main-features

    

• plugins:

  • doc into doc

  • all others plugins, into a new Sirius folder

    

• releng-sirius -> nothing to copy, we must adapt the Papyrus releng folder
• specs -> this folder contains the specs extractor used to build the initial requirements. I propose to abandon it.
• tests
  • org.eclipse.papyrus.sirius.junit.utils -> moved into the tests/junit/framework folder
  • org.eclipse.papyrus.sirius.bundles.tests -> moved into the tests/junit/framework folder
  • all other plugins -> moved into a new folder : tests/junit/plugins/uml/sirius