ocean-to-csv: fix to respect --fields option.
ocean-to-csv: remove superfluous lines.
hokuyo-to-csv: added --format option, see usage().
ocean-to-csv: added sanity check/data alignment check for ocean-to-csv's binary query mode.
sensors/hokuyo: added more comments, better message in exceptions.
Merge branch 'master' of https://github.com/acfr/snark