[provider.cube] major refactoring * fixed a major bug in setup(): geometry.global(geometry.center()) was wrong * not derived from Stuff::GridProviderCube anymore * removed default GridType * removed lots of constructors * added constructor which takes an existing grid
[provider.cube] major refactoring
* fixed a major bug in setup(): geometry.global(geometry.center()) was wrong
* not derived from Stuff::GridProviderCube anymore
* removed default GridType
* removed lots of constructors
* added constructor which takes an existing grid

pymor/dune-grid-multiscale