Make cli arg for hierarchical_bem consistent (- not _)
Remove some old unused code

my_assert.h
etc/useful_snippets.cc
semi_implicit_problem.[cc/h]
Clean up some comments etc.
Write out H-matrix structure .ps file if using H-matrices
Add a scaled down mumag4-shaped unstructured mesh (5x1.25x0.03 cubeoid)
Fix bug in parameter sweep where -outdir was not set correctly
Use string constants in hlib output filenames (required hlib patch)