Merge lp://staging/~danilovesky/workcraft/trunk-bug-1321714 into lp://staging/workcraft

CircuitPlugin/src/org/workcraft/plugins/circuit/VisualCircuitComponent.java (+6/-0)
GraphPlugin/src/org/workcraft/plugins/graph/ToolsProvider.java (+0/-3)
SONPlugin/src/org/workcraft/plugins/son/SONToolProvider.java (+0/-3)
WorkcraftCore/src/org/workcraft/Framework.java (+6/-10)
WorkcraftCore/src/org/workcraft/dom/AbstractGroup.java (+50/-41)
WorkcraftCore/src/org/workcraft/dom/DefaultHangingConnectionRemover.java (+1/-1)
WorkcraftCore/src/org/workcraft/dom/math/MathConnection.java (+2/-1)
WorkcraftCore/src/org/workcraft/dom/math/MathGroup.java (+13/-9)
WorkcraftCore/src/org/workcraft/dom/visual/AbstractVisualModel.java (+1/-5)
WorkcraftCore/src/org/workcraft/dom/visual/VisualGroup.java (+4/-0)
WorkcraftCore/src/org/workcraft/dom/visual/VisualPage.java (+4/-0)
WorkcraftCore/src/org/workcraft/dom/visual/connections/Polyline.java (+5/-1)
WorkcraftCore/src/org/workcraft/dom/visual/connections/VisualConnection.java (+6/-0)
WorkcraftCore/src/org/workcraft/gui/graph/tools/PageGeneratorTool.java (+1/-3)
WorkcraftCore/src/org/workcraft/observation/ObservableHierarchy.java (+1/-0)
WorkcraftCore/src/org/workcraft/observation/ObservableHierarchyImpl.java (+4/-0)
WorkcraftCore/src/org/workcraft/workspace/WorkspaceEntry.java (+6/-6)
XmasPlugin/src/org/workcraft/plugins/xmas/components/VisualXmasComponent.java (+6/-0)
XmasPlugin/src/org/workcraft/plugins/xmas/components/XmasComponent.java (+5/-0)