ENH: move all Heap code into Internals and privitize some containers, BUG: fix printself defect
ENH: move all Heap code into Internals and privitize some containers, BUG: fix printself defect

spthaolt/VTK,msmolens/VTK,jmerkow/VTK,jmerkow/VTK,candy7393/VTK,sumedhasingla/VTK,msmolens/VTK,gram526/VTK,mspark93/VTK,ashray/VTK-EVM,collects/VTK,SimVascular/VTK,aashish24/VTK-old,biddisco/VTK,mspark93/VTK,berendkleinhaneveld/VTK,mspark93/VTK,spthaolt/VTK,sankhesh/VTK,jmerkow/VTK,biddisco/VTK,hendradarwin/VTK,candy7393/VTK,johnkit/vtk-dev,ashray/VTK-EVM,keithroe/vtkoptix,SimVascular/VTK,biddisco/VTK,ashray/VTK-EVM,mspark93/VTK,demarle/VTK,ashray/VTK-EVM,jmerkow/VTK,spthaolt/VTK,keithroe/vtkoptix,cjh1/VTK,msmolens/VTK,aashish24/VTK-old,sumedhasingla/VTK,sumedhasingla/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,sumedhasingla/VTK,sumedhasingla/VTK,arnaudgelas/VTK,daviddoria/PointGraphsPhase1,arnaudgelas/VTK,msmolens/VTK,candy7393/VTK,spthaolt/VTK,biddisco/VTK,ashray/VTK-EVM,spthaolt/VTK,daviddoria/PointGraphsPhase1,naucoin/VTKSlicerWidgets,hendradarwin/VTK,johnkit/vtk-dev,jeffbaumes/jeffbaumes-vtk,mspark93/VTK,SimVascular/VTK,arnaudgelas/VTK,daviddoria/PointGraphsPhase1,demarle/VTK,jeffbaumes/jeffbaumes-vtk,hendradarwin/VTK,collects/VTK,jmerkow/VTK,johnkit/vtk-dev,jeffbaumes/jeffbaumes-vtk,msmolens/VTK,jmerkow/VTK,keithroe/vtkoptix,johnkit/vtk-dev,hendradarwin/VTK,sankhesh/VTK,demarle/VTK,berendkleinhaneveld/VTK,keithroe/vtkoptix,Wuteyan/VTK,demarle/VTK,sumedhasingla/VTK,naucoin/VTKSlicerWidgets,arnaudgelas/VTK,gram526/VTK,cjh1/VTK,keithroe/vtkoptix,Wuteyan/VTK,cjh1/VTK,gram526/VTK,Wuteyan/VTK,jeffbaumes/jeffbaumes-vtk,ashray/VTK-EVM,mspark93/VTK,Wuteyan/VTK,candy7393/VTK,biddisco/VTK,sankhesh/VTK,candy7393/VTK,SimVascular/VTK,naucoin/VTKSlicerWidgets,naucoin/VTKSlicerWidgets,biddisco/VTK,aashish24/VTK-old,daviddoria/PointGraphsPhase1,sankhesh/VTK,collects/VTK,berendkleinhaneveld/VTK,collects/VTK,daviddoria/PointGraphsPhase1,sumedhasingla/VTK,sumedhasingla/VTK,msmolens/VTK,aashish24/VTK-old,aashish24/VTK-old,aashish24/VTK-old,Wuteyan/VTK,candy7393/VTK,keithroe/vtkoptix,gram526/VTK,SimVascular/VTK,sankhesh/VTK,gram526/VTK,mspark93/VTK,jmerkow/VTK,candy7393/VTK,hendradarwin/VTK,naucoin/VTKSlicerWidgets,johnkit/vtk-dev,cjh1/VTK,cjh1/VTK,sankhesh/VTK,berendkleinhaneveld/VTK,gram526/VTK,spthaolt/VTK,demarle/VTK,candy7393/VTK,msmolens/VTK,jeffbaumes/jeffbaumes-vtk,Wuteyan/VTK,naucoin/VTKSlicerWidgets,Wuteyan/VTK,hendradarwin/VTK,daviddoria/PointGraphsPhase1,demarle/VTK,gram526/VTK,keithroe/vtkoptix,cjh1/VTK,SimVascular/VTK,ashray/VTK-EVM,sankhesh/VTK,johnkit/vtk-dev,collects/VTK,demarle/VTK,spthaolt/VTK,gram526/VTK,biddisco/VTK,ashray/VTK-EVM,SimVascular/VTK,berendkleinhaneveld/VTK,arnaudgelas/VTK,collects/VTK,jmerkow/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,demarle/VTK,johnkit/vtk-dev,jeffbaumes/jeffbaumes-vtk,arnaudgelas/VTK,msmolens/VTK,sankhesh/VTK,mspark93/VTK,SimVascular/VTK