Added a codespell config file

The latter dozen or so files are suppressed because they contain a lot of French.

.codespellrc

@@ -0,0 +1,3 @@
+[codespell]
+skip = ThirdParty,Utilities,*.eps,*.vtp,./Infovis/Core/vtkWordCloud.cxx,./IO/Xdmf3/Testing/Python/ManyFiles.py,./Rendering/Label/Testing/Cxx/TestLabelPlacementMapper2D.cxx,./Rendering/Label/Testing/Cxx/TestLabelPlacer2D.cxx,./Utilities/Doxygen/doc_index.stop,./Common/DataModel/vtkHyperTreeGrid.cxx,./Common/DataModel/vtkHyperTreeGrid.h,./Common/DataModel/vtkHyperTreeGridLevelEntry.cxx,./Common/DataModel/vtkHyperTreeGridNonOrientedGeometryCursor.cxx,./Common/DataModel/vtkHyperTreeGridNonOrientedGeometryCursor.h,./Common/DataModel/vtkHyperTreeGridNonOrientedSuperCursor.h,./Common/DataModel/vtkHyperTreeGridNonOrientedSuperCursorLight.h,./Common/DataModel/vtkHyperTreeGridNonOrientedUnlimitedGeometryCursor.cxx,./Common/DataModel/vtkHyperTreeGridNonOrientedUnlimitedSuperCursor.h,./Common/DataModel/vtkHyperTreeGridOrientedGeometryCursor.cxx,./Common/DataModel/vtkHyperTreeGridScales.h,./Common/DataModel/vtkReebGraph.h,./Common/DataModel/vtkUniformHyperTreeGrid.cxx,./Filters/Hybrid/vtkAdaptiveDataSetSurfaceFilter.cxx,./Filters/Hybrid/vtkAdaptiveDataSetSurfaceFilter.h,./Filters/HyperTree/vtkHyperTreeGridThreshold.cxx,./Filters/HyperTree/vtkHyperTreeGridThreshold.h,./Filters/HyperTree/vtkHyperTreeGridToDualGrid.cxx,./Filters/Modeling/vtkHyperTreeGridOutlineFilter.cxx,./Filters/Modeling/vtkHyperTreeGridOutlineFilter.h,./Filters/Parallel/vtkHyperTreeGridGhostCellsGenerator.cxx
+ignore-words-list = acount,aline,alledges,alog,alse,ans,apoints,arry,childs,claus,connexion,daa,datas,delt,dependees,dne,dota,dout,dragable,eiter,enew,fiter,fo,fpr,globa,goup,hart,hask,hsi,inbrace,indext,inout,inouts,inport,isconnection,ist,lastr,linez,lke,lod,lsit,mater,nax,nd,ned,nin,noe,normale,normaly,numer,ontext,ony,ore,ot,outout,passin,piar,ppolygons,pres,ptd,rade,raison,readds,requestor,rsource,seh,shepard,shepards,sie,slac,strat,te,thi,thist,tne,tre,tread,ue,unknwn,unser,varn,vie,wee,xwindows,yau