update TODO
automated output format/mumax3-convert test
update racetest.bash
fix ovf1_binary output
oommf: also retrieve stepsize from header
mumax3-convert -o flag
restore testdata
test/mask: use testdata/
fix test/mask
settable arrow size
test/run.bash: remove time(...) which caused exit status 0 on failure
fix smoothdemag for default edgesmooth=0
api: clenaup geom, B_therm