Bug 317954 Version deltas file so that incompatible changes will be ignored
The deltas file needs to be versioned so that incompatible changes will be discarded allowing the workbench to be constructed as if there were no deltas in existence.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/XMLModelReconciler.java
|| featureName.equals(TRIMCONTRIBUTION_POSITIONINPARENT_ATTNAME)) {
			
			if (object instanceof MToolBarContribution) {
				return MenuPackageImpl.eINSTANCE.getToolBarContribution_PositionInParent();
			} else if (object instanceof MTrimContribution) {
				return MenuPackageImpl.eINSTANCE.getTrimContribution_PositionInParent();
			}
			return MenuPackageImpl.eINSTANCE.getMenuContribution_PositionInParent();
		} else if (featureName.equals(MENUCONTRIBUTION_PARENTID_ATTNAME)) {
			return MenuPackageImpl.eINSTANCE.getMenuContribution_ParentID();
		} else if (featureName.equals(TOOLBARCONTRIBUTION_PARENTID_ATTNAME)
				|| featureName.equals(TRIMCONTRIBUTION_PARENTID_ATTNAME)) {
			
			if (object instanceof MTrimContribution) {
				return MenuPackageImpl.eINSTANCE.getTrimContribution_ParentId();
			}
			return MenuPackageImpl.eINSTANCE.getToolBarContribution_ParentId();
		} else if (featureName.equals(MENUITEM_MNEMONICS_ATTNAME)) {
			return MenuPackageImpl.eINSTANCE.getMenuItem_Mnemonics();
		} else if (featureName.equals(PARAMETER_NAME_ATTNAME)) {
			return CommandsPackageImpl.eINSTANCE.getParameter_Name();
		} else if (featureName.equals(PARAMETER_VALUE_ATTNAME)) {
			return CommandsPackageImpl.eINSTANCE.getParameter_Value();
		} else if (featureName.equals(COREEXPRESSION_COREEXPRESSIONID_ATTNAME)) {
			return UiPackageImpl.eINSTANCE.getCoreExpression_CoreExpressionId();
		} else if (featureName.equals(TOOLBARCONTRIBUTIONS_TOOLBARCONTRIBUTIONS_ATTNAME)) {
			return MenuPackageImpl.eINSTANCE.getToolBarContributions_ToolBarContributions();
		} else if (featureName.equals(TRIMCONTRIBUTIONS_TRIMCONTRIBUTIONS_ATTNAME)) {
			return MenuPackageImpl.eINSTANCE.getTrimContributions_TrimContributions();
		} else if (featureName.equals(PERSPECTIVE_WINDOWS_ATTNAME)) {