Added list if SFC indices to the cg%refine_flags
[grid_container] added cg%refinemap array
Implemented refinemap2SFC_list
moved ref_flag into separate module
ref_flag%sanitize pays some attention to SFC_refine_list
[refinement_flag] safer (re-)initialization of ref_flag
[grid_container] BUGFIX: typo
Merge commit '8448fc8' into smart_refine
[refinement_update] improved VERBOSE message
[maclaurin] made refinement criteria more local
[refinement_flag] added offset field to type SFC_candidate and changed how the new grids are added
[cg_list] updated cg_list_T%count_ref_flags
Merge branch 'master' into smart_refine
[cg_list] updated clear_ref_flags
[refinement_update] introduced sanitize_all_ref_flags routine
user refinement may request refinement either by setting cg%refinemap or by cg%refine_flags%refine - no need to set both of them
refinemap2SFC_list extended to convert leafmap in absence of refinemap
[grid_container] BUGFIX: refinemap2SFC_list was refining grid propositions twice
[refinement_update] refine_one_grid now can make use of detailed list of refinement requests
[maclaurin] fixed refinement/derefinement criteria to avoid oscillations