initial commit of kernel extensions for allocation editor

...s/tooling/base/ui/editor/AllocationDiagramEditorBase.java

...oling/base/ui/editpart/AllocationDiagramEditPartBase.java

...oling/base/ui/editpart/AllocationElementEditPartBase.java

org.fortiss.tooling.kernel.ui/trunk/plugin.xml

...ing.kernel.ui/trunk/schema/allocationEditPartFactory.exsd

...oling/kernel/ui/extension/IAllocationEditPartFactory.java

.../kernel/ui/internal/AllocationEditPartFactoryService.java

.../kernel/ui/service/IAllocationEditPartFactoryService.java