Merge branch 'feature/dofvector_global_evaluation' into 'develop'

src/amdis/FileWriter.hpp

src/amdis/ProblemStat.hpp

src/amdis/gridfunctions/CMakeLists.txt

src/amdis/gridfunctions/DOFVectorView.hpp

src/amdis/gridfunctions/DerivativeGridFunction.hpp

src/amdis/gridfunctions/DiscreteFunction.hpp

src/amdis/gridfunctions/DiscreteFunction.inc.hpp

src/amdis/utility/RangeType.hpp

test/CMakeLists.txt

test/DiscreteFunctionTest.cpp