Merge branch 'issue/gradiente-of' into 'master'

Fix name of gradientOf

See merge request amdis/amdis!79

amdis/DOFVector.hpp

@@ -200,7 +200,7 @@ namespace AMDiS
     }
 
     /// Return a derivative grid-function representing the gradient (jacobian) of the DOFVector
-    friend auto gradienteOf(DOFVector const& dofVec)
+    friend auto gradientOf(DOFVector const& dofVec)
     {
       return dofVec.makeDerivative(tag::gradient{});
     }