Add EcoreSerializerBase, a base class to implement serializers to load and save resources whose root element is of type {@code R}.

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Added introspection GUI and made all relevant services implement IIntrospectiveKernelService. Found a bug with marker service (see bug 2461).
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- Remove deprecated method KernelModelElementUtils.getParentElement(EObject, Class). Use KernelModelElementUtils.getParentElement(EObject, Class, boolean) instead.

Move DreamsPlatformUtils.{disableNotificationsOf(), enableNotificationsOf(), setNotificationsOf()} to EcoreUtils

- Add computeFullyQualifiedName(INamedElement element, boolean includeTopLevel) that allows to skip the top-level of a name (the FileProject in AF3)
- The behavior of computeFullyQualifiedName(INamedElement element) is preserved to include the name of the top-level element
- Change implementation of computeFullyQualifiedName() and computeRelativeName() to use the a StringBuilder and the prependName() helper method

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Added a comment in ObjectAwareServiceBase#getRegisteredHandlers stating that this method should be changed if the behavior (from AnntotationValueService) is reused in the future.
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