[sedov] removed obsolete sedov_vars_hdf5 (user-defined gid field available as grid_id field
[data_hdf5] more descriptive warning
[divvtest|int_bnd_test|pr_test] removed obsolete problem pointers for user_vars_hdf5
Merge pull request #56 from gawrysz/fargo_AMR

Fargo amr
Merge pull request #57 from gawrysz/cosmetics

Cosmetics
Merge pull request #58 from gawrysz/simplify_cg_level

Simplify cg level