[Therion] backcompass and backclino in team and instrument descriptions

Hi, I think I may have found a minor bug: Therion does not accept 'backcompass' or 'backclino' as a valid role in the team command or a valid description in the instrument command eg this does not work: team "Fred Flintstone" tape backcompass backclino instrument backcompass "Silva Type80 F" instrument backclino "Suunto 646575" whereas this is OK: team "Barney Rubble" notes compass clino instrument compass "Silva Type80 C" instrument clino "Suunto 522534" The equivalent role and description are valid for the *team and *instrument commands in Survex. Duncan Collis