fixed out of bounds warning

-  cusparseSpMVAlg_t algtype = CUSPARSE_MV_ALG_DEFAULT;
+  cusparseSpMVAlg_t algtype = CUSPARSE_SPMV_ALG_DEFAULT;

maybe CUSPARSE_MV_ALG_DEFAULT

Reactivated stuff to allow for DWR error estimation using the Q1 elements using CGMixed discretization.

New example gascoigne-examples/09-Dwr

Still to work on Stokes and other advanced topics. Open:

- higher order
- handling of non-zero Dirichlet boundaries
- Lps Discretization in Mixed

Merge branch 'master' of gitlabkosinus:gascoigne/gascoignelib

Gascoigne include dirs are now specified in the file CMakeIncludes.txt. This file must be included from any project using Gascoigne as library.

Functionals will be named by label that is given to the FunctionalManager and not by the name that is returned by the functional class itself

	MultigridInterpolatorMatrix

This version is running in parallel.