reduces subgridlist visiable type exports
gets rid of dune-subgrid usage everywhere

also disables large chunks of LOD-only code that is now defunct
move the error handling to error_estimator where it belongs
remove more useless code
3x speedup for Elliptic_MsFEM_Solver::identify_fine_scale_part
rename stuff in local solution manager
use spgrid for local problems too
msfem-algorithm.cc cleanup
temp. hardcode unit cub factory into msfem grid init
get rid of yet another subgrid_to_hostrid_projection
refactor boundary info
rename solve_dirichlet_zero
fixes copypasta fail in msfem_solver
Prototype for localgrid aware, smart het. projection usage
unused functionality cleanup
buggy LocalGridSearch implementation
prelim. working version of all local grid to global fine grid projection
clarify using local_solution as tmp storage in msfemsolver
cleanup
create local grids with oversampling