Merge branch 'feature/r-adapt-curves' into 'master'

CHANGELOG.md

docs/user-guide/utilities/nekmesh.tex

library/NekMesh/CADSystem/CADCurve.h

library/NekMesh/CADSystem/OCE/CADCurveOCE.cpp

library/NekMesh/CADSystem/OCE/CADCurveOCE.h

library/NekMesh/CADSystem/OCE/OpenCascade.h

library/NekMesh/MeshElements/Node.h

...y/NekMesh/Module/ProcessModules/ProcessVarOpti/ElUtil.cpp

...ary/NekMesh/Module/ProcessModules/ProcessVarOpti/ElUtil.h

...Mesh/Module/ProcessModules/ProcessVarOpti/NodeOptiCAD.cpp

...sh/Module/ProcessModules/ProcessVarOpti/PreProcessing.cpp

...h/Module/ProcessModules/ProcessVarOpti/ProcessVarOpti.cpp

...esh/Module/ProcessModules/ProcessVarOpti/ProcessVarOpti.h

library/NekMesh/Octree/Octree.h

utilities/NekMesh/CMakeLists.txt

...es/NekMesh/Tests/MeshGen/STEP/2d_circle_square-radapt.mcf

...es/NekMesh/Tests/MeshGen/STEP/2d_circle_square-radapt.tst