Introduce "derived" annotation, i.e. based on calculations instead of explicit annotations / model contents can be implemented

- DerivedAnnotationBase meta-model element, with getValue() EOperation, and a extensive documentation.
- Corresponding DerivedAnnotationValueProviderBase, implementing a read-only, text-view of the calculation result
- To implement the above, move handling of annotation EClass & factory to ValueProviderBase

refs 1841

updated the ecore & genmodel models to Kepler (files are strucutrally identical but textually different, hence Eclipse was always displaying local differences)
refs 1868

refs 1841

refs 1841

added new specification for memory and sil in scheduling model instead
moved addSpecifications functionality to tooling base
refs 1598

refs 1590

refs 1369

refs 1411

refs 694

refs 674

refs 674

removed dummy component from testing model
cleaned directory

added opposite references to IConnector, IConnection and IHierarchicalElement for convenient model navigation and data binding
refs 301

refs 311

- method specificationDescription: returns short description of IModelElementSpecification, e. g. "State automaton" for StateAutomaton.

refs 337

refs 153

added ecore builder into kernel project
refs 191

added port connection compositor

reworked some meta-models