Mesh improvements:

+ support of Simple Model Format (smf)
+ improve reading of STL files (reduce by ~70%)

src/Mod/Mesh/App/Mesh.cpp

@@ -458,6 +458,7 @@ void MeshObject::swapKernel(MeshCore::MeshKernel& kernel,
         }
     }
 
+#if 0
 #ifndef FC_DEBUG
     try {
         MeshCore::MeshEvalNeighbourhood nb(_kernel);
@@ -477,6 +478,7 @@ void MeshObject::swapKernel(MeshCore::MeshKernel& kernel,
         Base::Console().Log("Check for defects in mesh data structure failed\n");
     }
 #endif
+#endif
 }
 
 void MeshObject::save(std::ostream& out) const