Added flat matrix and vector used for ElementMatrix and ElementVector

See merge request !94

added code from the mpi14 library for parallel mpi communication with a nice wrapper interface

See merge request !83

update UniqueBorderPartition to support UGGrid

See merge request !87

added backport of transformedRangeView from dune-2.7 git branch

See merge request !88

added twist utilities to flip the order of edge DOFs

See merge request !85

evaluate marker-function only on the barycenter of the element

See merge request !92

added error messages to umfpack error codes

See merge request !91

changed grid construction to allow parallel grids to be created directly

See merge request !90

added stress tensor part for non-constant viscosity

See merge request !86

Feature/petsc cmake

See merge request !80

added helper utility to wrap Dune::FunctionFromCallable constructors

See merge request !84

added worksournd for fallthrough compiler warning

See merge request !89

extended search directories to find MTL

See merge request !82

check for cxx flags with -pedantic-errors flag

See merge request !81

write only rank 0 in parallel

See merge request !71

This reverts commit 62155381.

parallel filewriter

See merge request !76

constructor call of FieldVector corrected in convectionDiffusionOperator

See merge request !74

Restricted integration to interior elements

See merge request !73

corrected init file of heat example to support output

See merge request !75