Add the 2 files groupOfElements and PViewDataGModel in the exported header as...

Add the 2 files groupOfElements and PViewDataGModel in the exported header as I need it. In addition add nodalBasis.h which is required by MElement.h (bug fix)

CMakeLists.txt

@@ -108,8 +108,9 @@ set(GMSH_API
   Solver/dofManager.h Solver/femTerm.h Solver/laplaceTerm.h Solver/elasticityTerm.h
     Solver/crossConfTerm.h Solver/orthogonalTerm.h
     Solver/linearSystem.h Solver/linearSystemGMM.h Solver/linearSystemCSR.h 
-    Solver/linearSystemFull.h Solver/elasticitySolver.h Solver/sparsityPattern.h 
-  Post/PView.h Post/PViewData.h Plugin/PluginManager.h Post/OctreePost.h
+    Solver/linearSystemFull.h Solver/elasticitySolver.h Solver/sparsityPattern.h    Solver/groupOfElements.h 
+  Post/PView.h Post/PViewData.h Plugin/PluginManager.h Post/OctreePost.h Post/PViewDataGModel.h
+   Numeric/nodalBasis.h
   Graphics/drawContext.h
   contrib/kbipack/gmp_normal_form.h contrib/kbipack/gmp_matrix.h 
     contrib/kbipack/gmp_blas.h contrib/kbipack/mpz.h