refactoring of connection compositor service

org.fortiss.tooling.base.ui/trunk/META-INF/MANIFEST.MF

...rg/fortiss/tooling/base/ui/command/ConnectionCommand.java

...ui/compose/HierarchicElementConnectionCompositorBase.java

...runk/src/org/fortiss/tooling/base/ui/dnd/DragContext.java

...tooling/base/ui/editor/gef/GraphicalViewerEditorBase.java

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

...kernel/trunk/schema/modelElementConnectionCompositor.exsd

...fortiss/tooling/kernel/base/EObjectAware2ServiceBase.java

...ling/kernel/interfaces/IConnectionCompositionContext.java

...tiss/tooling/kernel/interfaces/IConnectionCompositor.java

.../tooling/kernel/internal/ConnectionCompositorService.java

...tooling/kernel/services/IConnectionCompositorService.java