restrict order to functions

See merge request !200

no var-tracking-assignments

See merge request !199

repaired the order function

See merge request !198

redesign polynomialDegree and order of gridfunction and basis-nodes

See merge request !196

Fixed issue with pack expansion of alias template

See merge request !195

correct boundary condition treecontainer access

See merge request !194

add extended TreeContainer implementation and replace TreeData

See merge request !193

cleanup max and min in Math

See merge request !192

reduct compile time in neumann example

See merge request !191

variadic packs

See merge request !189

remove warnings

See merge request !190

Keep unchanged sparsity pattern

See merge request !166

Remove BiLinearForm::pattern_
Change Pattern to be created in BiLinearForm::init()
Change BiLinearForm Observer to set a flag instead of directly rebuilding the pattern
Change Pattern ctor to replace call to init
Make Pattern::init protected
Add MatrixFacade::init() and implementations MatrixBackend::init() with no argument
Change MTL matrix backend slot size calculation

Add BiLinearForm::setSymmetryStructure
Change SymmetryStructure is now supposed to be set by the user after adding operators

set gitlab-ci images to dune images and test dune-2.6, 2.7 and master

Closes #13

See merge request !184

reduce deprecation and other warnings introduced by recent changes in dune 2.8

See merge request !186

remove the traits is_template()

See merge request !187

Move initial refine/loadbalance to MeshCreator

See merge request !183

Add update() method for grid to adapt dependencies

See merge request !185