[assembler.local.codim1] added Codim1CouplingOperatorAccumulateFunctor
[products.swipdgpenalty] added first draft to playground
[products.base] added coupling operator to LocalOperatorProviderBase
[products.base] updated documentation of LocalOperatorProviderBase
[products.base] added coupling operator to LocalizableBaseHelper
[products.base] added compute_locally()

This is required to allow access to local results, i.e. in the context of
error estimation.
[products.base] added coupling operator to AssemblableBaseHelper
[products.base] moved pattern creation from helper to base
[test.products_swipdgpenalty] added test for 1d, refs #20
[assembler.local.codim1] whitespace
[assembler.local.codim1] added debug logging to ...Coupling...Functor
[localevaluation.swipdg] added debug logging to BoundaryLHSPenalty
[test.operator_products_prolong] disable properly
add template parameter ScalarImp to occurences of Matrix/Vectorinterface
add template parameter ScalarImp to occurences of Vector/MatrixInterface
[localevaluation.swipdg] add missing include
[test.grids] add definition of AluConform3dGridType
[assembler] fix ScalarTypes for Vector/MatrixInterface
[operators] fix ScalarTypes for Vector/MatrixInterface
[products.interfaces] fix ScalarType for VectorInterface